Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d5a869272f5de7…

MALICIOUS

PDF

68.0 KB Created: 2021-05-14 22:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e66cc4832695844af7cb05ff7c2ee0d7 SHA-1: de0955babcc53de2d8165f4f3cd3cc0428883ce2 SHA-256: 35d5a869272f5de7f7d7e24c467a96c23976e5101846ce67758af0ccaa2e99f8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1a76160d2---legezedemuf.pdf
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/1gfbs889iqhh1qi52l6ngc6pgg/57049676689.pdf
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d81f1f370a65679c74c492faacf496ee/15222166927.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5dfbc02a9---83480355689.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083ec42b1b57---jemenilodujukemeriru.pdf
    • http://eotp.info/sites/default/files/fck/file/vududodim.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee24d8ae2b---37465061012.pdf
    • http://hurtmar.pl/Upload/file/52981578706.pdf
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/e1cd5e74b68bed4d7b47f4e054a35f31/84951138181.pdf
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086816f5f095---dagetojanubojawivuwebib.pdf
    • http://juniorsmagazine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fe0466231---retozowobumal.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/d10cb23fa33f219756143dcdc66fd5b8/57633114350.pdf
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a535e9940044d41227851bd0c8c7230/rujimozepo.pdf
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/1f7c498d745f004fd004363d7aac21c8/muzenapozuro.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987c8d3530e---beduwizoluvaguv.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/cud07vluejqr9g799lcjeu6jkr/91875636257.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160838790a44b6---45273210367.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/mh83cf3lasb46pluff2bksc1lo/30827708377.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=jquery+validation+prevent+form+submit
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cedd.bin
0b3c6af5fe1b54304dee8e06a18d243d63f984cd4d9762cb5696bb39c2e0686e
pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDD 5604 bytes
font_01_sfnt_off0000e1de.bin
4c359eecdd56a94b7fb4e3fc068a4d74b67bdf25d9dab1d6838198710595878a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 9656 bytes