Malicious PDF — malware analysis report

Static analysis result for SHA-256 946b7126839f42e4…

MALICIOUS

PDF

105.4 KB Created: 2021-06-19 23:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3050d196a1f4b865d1586a2bef3e2e66 SHA-1: eeb732033bf4ed876c5d719c665e079b6aa42837 SHA-256: 946b7126839f42e4f34c3c86e24ae165151eaeb42461e266b6955702c49b4ce0
154 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, many hosted on compromised CMS platforms, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains keywords related to downloads, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7220

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 https://allytemp.ru/uplcv?utm_term=kantha+sasti+kavasam+download+tamil PDF link annotation
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/fcc3367f8a83b8bc770ea46f2d823872/35792581999.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/c9ad0b3d36947b37618f64dc7aaf0acc/63336839853.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3a852d744c890463b9a32e9e2f43c0ee/16224564422.pdfIn PDF document text
    • https://pellevah.com/upload/files/56182276445.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/jo055oiphtp8gtov7fhv5mhcee/demafogelesixewagi.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d20a34d31---50874189470.pdfIn PDF document text
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/3osr6i7ko01ma99ecs58689je5/99575268218.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab42c0b3375---15601159373.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb45e8f674---kugulukafogofomogilabupez.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/e678645df0ba160942d52d6b3d7d2a50/98263749858.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/manapowuxazu.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d8b178999---liwofifevosalapaduxujofo.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/dc038c05680eff00d49bac6808a845d1/sijumu.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/7vnnnu2tn838i3348c2da2m6u9/meruripiforosijebogidugix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C6D 10256 bytes
SHA-256: d3140a050836ee831febfb1c582a92444e809a10193f6943247653da85dc1461
font_01_sfnt_off00018e6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E6D 4824 bytes
SHA-256: a669c6d8520eb950d6b59cb6101d38e316718bef2d9c3ccb62ba13e1afe8d299

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