Malicious PDF — malware analysis report

Static analysis result for SHA-256 abad66cdddbe0e3d…

MALICIOUS

PDF

173.2 KB Created: 2021-06-29 16:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5cc5a15b54ba2f2a9b396f76e396565d SHA-1: 1eda03be0267cd2b0887307d97c472e89aedb744 SHA-256: abad66cdddbe0e3dfe39ece1db7cdee897d92cea915bd71e7e1bd0c3f00cb1d7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, with heuristics indicating embedded JavaScript and a link farm pointing to compromised WordPress uploads and disposable hosting. The embedded JavaScript likely attempts to redirect the user to malicious sites, as suggested by the numerous unknown URLs found within the document. The presence of these elements strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8457

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/a94524cf5208aff1fddd70ecd5a4321b/92035996038.pdf In PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/ojamrbakbaenq7r5nij7feojg7/bilivin.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/74084283796.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/bitozovumaguxabiv.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/784204117.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/b3c962mglbe4qogmsk18qqhhh6/96527388977.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8e8a634e1---somivagebuzabixa.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0a6c10705---pebuba.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/19231022984.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/ba27390a8de05d294542c30add64f17d/zeluvujodekofonolewije.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/runepusareve.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16083d0be7799f---makejufubisajaxanolodali.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c440029f10---vujame.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce0b2876eb---9078481772.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/gedakobalexivikesukeref.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/094c7c583195bcfe354f08fcf6739609/86906149012.pdfIn PDF document text
    • http://www.southforconstruction.com/frontend/web/ckfinder/userfiles/files/pefukugigozipok.pdfIn PDF document text
    • https://birgatour.mn/js/ckfinder/userfiles/files/64583905964.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7deb784ed---97471828750.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/ac233b7544f624fd984f5c44588f6467/11239876283.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4286ed26fb49cf2b51f1836d47c04972/medenawefukiwibafe.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/0hpjf3es0722vrcb6oi3hqfpbk/42830796411.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a3fd9ee48df---nuvozusedaburev.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/69f0db219f96afeaeeefdc853221940b/92371084727.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160873f3387861---36770673334.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/ripanaxuvigamevulavi.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/lvoe1peepd17a8iv6ud2qolc43/fitifupunilasolojasaxozo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=om+mantra+most+powerfulPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D798 27548 bytes
SHA-256: fa849263770059d3f40a43c9946dbbb7e018f52d473fc1951ead4c8b13d2b4fe
font_01_sfnt_off000224c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x224C6 25564 bytes
SHA-256: 64ce53eaba332de9db83e2762acd46457f7107d65c25e6d3ef8a61e00f763f85
font_02_sfnt_off00025e9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25E9F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000276b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x276B6 10640 bytes
SHA-256: 51c7671bae3e2107f8b2f23616f898716d3f110a8b65a3900fa52f3a41077c2b
font_04_sfnt_off00028f29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28F29 16508 bytes
SHA-256: 11ce572d1276990959782b8611d5dfed1a68690812447e2ff1d2b628db765940

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