Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c2fa6ee10b39174…

MALICIOUS

PDF

77.4 KB Created: 2021-09-01 03:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8519f7c3cc1628da92a1a1091c7d7d9d SHA-1: a36570be0ed34106ddf2245a164638735df31711 SHA-256: 6c2fa6ee10b3917489f2fe6d89802a04249211e3fa273ef840d9ac29f165bab5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. The presence of multiple PDF link farm heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://crewmak.ru/uplcv?utm_term=hs+code+for+goggles PDF link annotation
    • http://benthanhsgfarm.com/images/uploads/files/bexiloziloxunepuveja.pdfIn PDF document text
    • https://ladangmimpi.com/contents//files/nerosesel.pdfIn PDF document text
    • http://wadirumshootingstars.com/userfiles/file///jowawinadalala.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/98498252043.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abda5e0765a---dijodozuxum.pdfIn PDF document text
    • https://33mobility.net/uploads/files/78786087409.pdfIn PDF document text
    • http://glcore.net/ckfinder/userfiles/files/77175091346.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/totelurezugawodogar.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a5d708eb64---risajakufimegiga.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d76478244---segimej.pdfIn PDF document text
    • http://xsteelstock.com/d/files/99577523173.pdfIn PDF document text
    • http://oresteruggiero.com/userfiles/files/95974705886.pdfIn PDF document text
    • http://cen7dias.es/userfiles/files/tidorujun.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a39c695ea---dapavubevigaxetomopuxozem.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/lekalezigoxo.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/poxataxevosu.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160acf3e2e9498---64812558692.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb2fab127e---vubuxarowes.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/988d7e5889c81b06dd9c1596c78620ac/vibiv.pdfIn PDF document text
    • http://opusbiz.kr/data/editor/file/17952388946124d2c40e9ce.pdfIn PDF document text
    • http://george-dollie-nelson-mass-reunion.com/clients/3/33/33de80a6744892f7217a81a137582dad/File/pewotarol.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076cbadeb845---97863465998.pdfIn PDF document text
    • http://scmsalliance.com/clients/864514/File/bovabuwexavezisopabif.pdfIn PDF document text
    • http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/15806257545.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_off0000cb68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB68 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e37a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37A 17152 bytes
SHA-256: 2fe856b481b05a9dbaac98a90185b2e44242f963e057ea88a7559f16b91e6939
font_02_sfnt_off00011096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11096 10188 bytes
SHA-256: 9c00b0bcdfd853f0a96fb38b8744eeb60e8f92fd51aac43694cdb038c57f4420