Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e42202bc75f11c…

MALICIOUS

PDF

84.1 KB Created: 2021-09-07 17:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e1cde4dc4305c93791f0764d2c8b803a SHA-1: 0706c1918201834bf657cd01653999285dbc8324 SHA-256: 31e42202bc75f11cf9d21a274b7b3b0027926fad32a419d9c5a7c2d6dfe61522
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic confirm the file's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=technics+1200+mk7+manual PDF link annotation
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc9a01a933---46041519722.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/5e0e306d2ca611009d3aad2879cec2b5/9111516740.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/e6226b38753adadb9ba5391b1d2cbeb0/bexaperagotug.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/bilenudapoputi.pdfIn PDF document text
    • http://cuacuondaiphuc.com/upload/files/xukubeganevulivinonim.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/separedegovajirirakos.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/9b3b6b9a0bafaee9df5c0d8c82147512/83178416090.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/c72e405c92a1bdc1fa142a8d75f4f1be/vamudejolefokesuvuf.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/bodekikaxejoxewa.pdfIn PDF document text
    • https://autopratichesas.it/file/72557346730.pdfIn PDF document text
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/kopugubusopa.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d6626daa0---49662097585.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/76106474856.pdfIn PDF document text
    • http://ccshecea.org/upload/files/83796047017.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/92583009331.pdfIn PDF document text
    • http://expertsystemgroup.com/file_media/file_image/file/juxonalulamivunulevu.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b19d4872ba---8450682010.pdfIn PDF document text
    • https://plasy.com/uploads/file/ruxisotal.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/bebajufulemofulu.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607343ed07028---50651682230.pdfIn PDF document text
    • http://betamarin.com/images/media/files/dipodanozikuvodasu.pdfIn PDF document text
    • https://clap-bas.com/userfiles/file/17391516824.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/69186653815.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF39 10676 bytes
SHA-256: 86165317bd380e3557bbe4f454db6a91e3a4041aef4e4cf6a6bce20428c760e6
font_01_sfnt_off0000f7a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A1 19020 bytes
SHA-256: 1974028a9c6d44a4ad70370d42a7c187c826e4f877fcb198282fb7d3533a80fd
font_02_sfnt_off0001299b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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