Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c4a083adba26b3…

MALICIOUS

PDF

54.4 KB Created: 2021-05-14 08:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da68b49d1191e28649ab870fd21b3ede SHA-1: 01a339045fcf69ca70be9dc0bf94c40608427239 SHA-256: f2c4a083adba26b33b4c458cd5072d107d74a1c33e29e86d6183d5a216f4ab3a
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites or disposable domains, suggesting a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification further support its malicious nature. The embedded content appears to be related to a test worksheet, likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7050

Heuristics 5

  • 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
  • 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://wastran.ru/uplcv?utm_term=present+simple+present+continuous+test+worksheet
    • http://martom24.pl/martom/userfiles/file/32233077007.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c349cb5e8c---34512511996.pdf
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/kl0gj10hi9mi4hg68sq758qj50/zakufe.pdf
    • http://alpanelektrik.com/depo/sayfaresim/file/jofiwusalubozi.pdf
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/e45mb826o3a4ahckf76f79lhe4/topipozexideradomapunid.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc2a5c774c---muguximupozizabozad.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160723ff67c584---5432951426.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/0ngqrk86bdfjt625rn8ien2hrg/82008563105.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/26e25c5036bc05f81e00cdc9e7bbc426/92679191652.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/62a4f3d301ecf67b5ace96e11bdb11ce/zavesudivezeniwibavosa.pdf
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091189ada444---lajipirobamidebinutosezut.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d43726b015d6d108f67937e594163d4c/10060596128.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/8ea8a034d82439606800a70e1f358d05/54992897505.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607e309164b9b---jesaji.pdf
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091f9f4e09b1---41009338819.pdf

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