Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d302c89d5ff59a2…

MALICIOUS

PDF

84.7 KB Created: 2021-09-06 14:13:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 808b1385e31d651a7dcbea1605e6aa43 SHA-1: c34f0aba61e35cb6b2cc9c33b1a7384da8a275bb SHA-256: 2d302c89d5ff59a2fc279a0a5d7e96c2a9cf2219a068142da6e2851abc79b7dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://cructi.ru/uplcv?utm_term=debate+skills+pdf PDF link annotation
    • http://smolensk-bakaleya.ru/userfiles/file/67988125209.pdfIn PDF document text
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/v8ba8kiib1odsu58pkrjrp1fik/xavukiwos.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/gegojizinipuvalivu.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/13111051473.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/7d70d7ceaa0a15afc350bb78435cdcb2/bavawobemo.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/gevirawab.pdfIn PDF document text
    • http://chayka-svg.ru/files/ropavevanoxira.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/femobed.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/161105409d5efc---getoxufinesuro.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/ca70008d1b1a912fb3c51fc738b01efc/67132852995.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1612775e3cfede---91171382961.pdfIn PDF document text
    • http://www.dfdtrading.sk/ckfinder/userfiles/files/41486320375.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/wajogud.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/wokema.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608249a490e3b---topasevezetefizexurezagu.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/7f619700caa2ae3fa5a741e0d1eb7fe6/6238572035.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/24430452333.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608db470e7497---feritulebugesutige.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/7bd302c58329168ee1ce1ee2432cfbde/nubeburezefo.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b781b91661---69792638066.pdfIn PDF document text
    • http://aimic.com/userfiles/file/sotoxirifolokemidamewejid.pdfIn PDF document text
    • https://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/18de24b473c0671339707f777e75973c/70400374031.pdfIn PDF document text
    • http://stevis.cz/files/file/xasadedozojugazabumasozis.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_off0000e840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE840 10400 bytes
SHA-256: feb06ed5c9f171fd69353cf52f3a4dd7ae92473f8d9479327dbb130171290247
font_01_sfnt_off0000ffb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB6 17636 bytes
SHA-256: fb4d6b7f08200379581f22b10fdbc50763b23164260878123fcf1d0abed7e6db
font_02_sfnt_off00012d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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