Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c7e6ad12ed5e35e…

MALICIOUS

PDF

80.7 KB Created: 2021-09-11 01:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 7342c82ee2229a52f4f1bd557f6fa2dc SHA-1: e13eabfc62e3152fe560a312898d46a829bbc160 SHA-256: 5c7e6ad12ed5e35e8c2a129d969f10369253d19d4b95be049ce81321822bd930
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous links, many of which point to websites hosted on compromised Content Management System (CMS) upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary function appears to be redirecting users through a link farm to potentially malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://www.playitdirect.ca/ckfinder/uploadfiles/files/94543004286.pdf In PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/i8e1ffdvoltmj8oq76nb3fnjhu/34184222530.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/79886851040.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/84d71ece1c176e4394bb0278903ff349/rudurizalire.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/17330643252.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5408e547222021d40d2421c9d5b529a7/76046260601.pdfIn PDF document text
    • https://yptea.com/data/fckeditor/files/tubij.pdfIn PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/68135548935.pdfIn PDF document text
    • http://neapol-m.ru/usr/file/95881790928.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/82389844904.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/2844adecf67253904f8fb4f46c58120f/47704415281.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/kukejunemos.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/a16d0d947b87842b0da66cc6c09250b5/bibok.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/xagal.pdfIn PDF document text
    • http://divorcefinance.nl/uploads/file/19693917403.pdfIn PDF document text
    • http://www.smartlandgroup.com/ckfinder/userfiles/files/denolimotezinofalojin.pdfIn PDF document text
    • https://infosantiere.ro/userfiles/file/60243970751.pdfIn PDF document text
    • http://safaraval.com/basefile/safaravalcom/files/52146876360.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/vegew.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/63623118219.pdfIn PDF document text
    • http://etkenkalip.com/files/67906682884.pdfIn PDF document text
    • http://world-housing.jp/ckfinder/userfiles/files/66105940613.pdfIn PDF document text
    • http://fsoa.cn/userfiles/file/79292384298.pdfIn PDF document text
    • http://sumosushingrill.com/uploads/files/44185231659.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=pokemon+crystal+dust+romPDF 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_off0000d26b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26B 10744 bytes
SHA-256: 575a44cf8c3d070461dd31663ac7868ce2ca5cd94bf266f4dc0c57d9b3bf351a
font_01_sfnt_off0000eb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 19236 bytes
SHA-256: adef69d8cf1c55555ed2a133f0c8d577fe7f5f926c8e3a2ca26f2b841cdaa53b

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