Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e82625afe4fafe…

MALICIOUS

PDF

80.4 KB Created: 2021-09-11 13:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: af1ae9b69cb3f1a1fbfc3a5e7ff44b12 SHA-1: c71bf10f59df58205d7d366f73b20bd9dfb71623 SHA-256: d0e82625afe4fafea8ee08c0c4405b8da148fc219067a3bd8da7630e3b046822
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to websites hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4058

Heuristics 5

  • 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
  • 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://zzweien.com/d/files/buvumefamebufejodasibexir.pdf In PDF document text
    • http://biomehl.com/images/content/files/549848062.pdfIn PDF document text
    • http://gleb777.com/fck_upload/file/91110037248.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5401bd1a1---tepalukilovewe.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/79179321006.pdfIn PDF document text
    • http://vnndt.com/Images_upload/files/45402074490.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/14989585730.pdfIn PDF document text
    • https://hoya.hr/UserFiles/file/ravati.pdfIn PDF document text
    • http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/ritase.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/1gug4e8pvuunj73c9m7rl0fkd0/josuwubadebamife.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/3724267375c07f2b5b1ee23ca4f47c73/nafurewuvupuvu.pdfIn PDF document text
    • http://managhantasala.net/mailuserfiles/file/63738797781.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/18727741727.pdfIn PDF document text
    • http://noithatdangcap.vn/app/webroot/uploads/files/jugamudilinewebo.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/90848058788.pdfIn PDF document text
    • https://barcelonacentromedico.es/files/galeria/files/75180250955.pdfIn PDF document text
    • https://mimpi1pusat.com/contents/files/10428299441.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139c9f76854c---63374677536.pdfIn PDF document text
    • https://immobiliareincentro.it/allegati/file/divaniz.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/wigaseko.pdfIn PDF document text
    • http://sakem.org/userfiles/files/60983296652.pdfIn PDF document text
    • http://oldadmin.k12cart.com/media/files/mivesumedetezuvetoloni.pdfIn PDF document text
    • https://pmrmhss.com/userfiles/file/fixirekudolez.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=feral+sins+read+online+freePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB06 10224 bytes
SHA-256: 4511d9caca680e816e5e07da1a26edba319e70925c046ff1e44340bbd56251ba
font_01_sfnt_off000101fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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