Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22a0f9d9081d881…

MALICIOUS

PDF

81.8 KB Created: 2021-09-19 16:10:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d4026e61331f1c615900ed34edeebb96 SHA-1: 1ec4bc696e5d48e9ef20b1b2c23b14db8b5736dd SHA-256: b22a0f9d9081d8813bdb6562714740b3cf7a7f028a8a13c22f3e6d2c1919f694
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://inwebjor.ru/uplcv?utm_term=man+utd+live+stream PDF link annotation
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dad44dc4b9---bagagepazibuvevuwomuzof.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/ghlh2jn49r5tnhdjchfbntu2ta/81907921389.pdfIn PDF document text
    • http://cortocircuito.trialpanel.com/images/Upload/files/26549239674.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/bc55fee135874b4bf49f993df17b9038/majakijakonimusowos.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/4368404736.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/puxenoxiwig.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/veworu.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/bedidijofumumefuxumulet.pdfIn PDF document text
    • http://bilateralmatters.org/userfiles/file/noxone.pdfIn PDF document text
    • https://conviviodihera.it/dati/upload/file/lorabipekifoxo.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/af5f554853ec5399740eaeafe18ebbdf/xodudolagebalurinalipesa.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/bp9kmev4l90lafhd7ntvg0as9p/viwumebomujawexiro.pdfIn PDF document text
    • http://asesoriazabalburu.org/azaba/files/file/velizejezujadilapugon.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/75468117627.pdfIn PDF document text
    • http://cy2hand.com/userfiles/gelixorubu.pdfIn PDF document text
    • https://unibel.pl/pliki/upload/file/sikajemipin.pdfIn PDF document text
    • http://appli-veolia.net/ckfinder/userfiles/files/pofag.pdfIn PDF document text
    • http://kubablimel.pl/Image/files/52681540905.pdfIn PDF document text
    • http://eatatrudy.com/uploads/files/97404477401.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/26908313321.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/fudusiwedugozibukame.pdfIn PDF document text
    • 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_off0000dcd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD8 10448 bytes
SHA-256: f2d4b2c49b4b3cb80299a0456819430509a1e91d5fe8fa006cb148ed33b2ec1c
font_01_sfnt_off0000f489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF489 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9B 17476 bytes
SHA-256: 9b76d89bd8a942a0db4ddae8c207de3fd89b7b530b838c7c835a0515a469db22

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