Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d4246891cf2d47b…

MALICIOUS

PDF

84.1 KB Created: 2021-06-29 00:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30165482b70d0a28f01f4053a104ca49 SHA-1: a87eec78c68aae95eb91085664a3b5b2eac810f8 SHA-256: 9d4246891cf2d47bb9dc9a2a1821731143f01d82c37c6d1238e6a06ab3f83a9e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDF files hosted on various domains, suggesting a link farm designed to distribute malicious content or phish for information. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or scamming attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://apexibd.com/uploads/fck_uploads/file/95532044814.pdf
    • https://tcremich.lu/files/files/60154750839.pdf
    • http://lexen.ca/userfiles/files/xodejaviloze.pdf
    • http://b-solutions.net/userfiles/file/77926961162.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/oekog0kab83thgfu72p5pa1tlh/gubujezigoragipud.pdf
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/r8l8i2ruscvu6jv4at1h6q576v/pesojeboririvumimetemep.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160847cb6a5326---zorogukode.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/c862f36098ec8e604ad196346ce57372/53112352695.pdf
    • http://jyotiacademicpress.org/uploads/file/33906040495.pdf
    • https://al-farh-iq.com/upload/userfiles/file/kesuzavuviwibepikefirova.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccc1985199---11913897100.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/baa5d9f16dc63d91c4262280faefbde4/jogopinamibab.pdf
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/40317355648.pdf
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/3d66f1cfd4e24a809a75fdfe03c8add9/79438712165.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608828e41a1e5---robavexofos.pdf
    • https://areicon.com/images/file/refesosesubu.pdf
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee137a5a71---tedoravutiladawik.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d075e4e9657---nofivana.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b799128dcc0---nidiledafakibebus.pdf
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/5cac4c0ca15777cfca008543a85aa82c/73428614692.pdf
    • https://tenfci.org/userfiles/file/derewiguxizuxukavidovaf.pdf
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3d4e3edd8---ruwozoposotafenu.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16090dabb8f644---68845373282.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/866f7751d3699bc7a7fff81383a3c061/77898604409.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=pell+grant+part+time
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7b9.bin
911a805fea3e3e1f6e439eb651390090c84541aa2c6458d948a631fa35bc779d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B9 10308 bytes
font_01_sfnt_off0000fee3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE3 16792 bytes
font_02_sfnt_off000116f5.bin
8d2acbae8f0d21cb64c3a0002616f1c2c05f99197e2a2b873a35ccdb859b917b
pdf-font-stream PDF embedded font (sfnt) at offset 0x116F5 17024 bytes