Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d06df5b47c5781e…

MALICIOUS

PDF

76.5 KB Created: 2021-09-04 02:28:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 13e176dcf149237eeb3f00e7acbfa7f3 SHA-1: aef8fcf36462bd2cb73885930c61e572ff3ebcf3 SHA-256: 9d06df5b47c5781efe01b99067679750f561f448cef99ad12adf9f9fcba1d59d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. It also features numerous links to compromised websites, suggesting an attempt to lure users to malicious content or download further payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alnahamgroup.com/userfiles/file/85674774086.pdf In PDF document text
    • https://nisahanpin.com/calisma2/files/uploads/wimirisupukojowazebipi.pdfIn PDF document text
    • http://amandatour.ru/js/ckfinder/userfiles/files/44247460915.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/4384c1f8e291b90c213ce3cd31ba7f96/49848488415.pdfIn PDF document text
    • https://alley.52886.tw/uploads/files/82168122772.pdfIn PDF document text
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/606041c4ab12786a33c44a87a044dc27/luvokexebelazerejofamadi.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/57204977328.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/5b5che8seon0bdl7am4fu9oln3/73005498782.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/30743943145.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/gixek.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/rozabu.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210702014734.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/70767808677.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/7435161599.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/51493441510.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a545b1d3eac---tasaxutiwalegurenuzete.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b633c825b82---sapakefuwulowa.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/votuxede.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/1807712057.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9b8a30b5a---divoxulilinajosulonitip.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a018345b3f9---68928167979.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/fudorulojixaze.pdfIn PDF document text
    • http://livilgirls.com/files/lakowul.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21a7c99686---84786570550.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=atlantis+the+antediluvian+world+pdf+downloadPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC60A 10828 bytes
SHA-256: 15a62bf48db881d65461fdb9bd7bda2bc24ea44ccbfe29ecb709b11bdd96bd8a
font_01_sfnt_off0000df03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF03 17176 bytes
SHA-256: f2f3dc738e19a3517432610a82e809ba568caec16717ffbc739735302f373cd4
font_02_sfnt_off00010b92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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