Malicious PDF — malware analysis report

Static analysis result for SHA-256 0888ecf0921e7feb…

MALICIOUS

PDF

64.0 KB Created: 2021-05-21 12:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b4515c0ed5ac280586df2512d559100c SHA-1: b68afe311f3f77c377aa147d7c479173ac23ba21 SHA-256: 0888ecf0921e7feb1e434425c91d89717398899ec009cdbfe3c10d84d22c53f2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting an attempt to distribute further malicious content or redirect users to phishing sites. The document body, though heavily obfuscated, contains references to "Tintin comic books pdf free download", indicating a social engineering tactic to entice users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7422

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://oniceh.ru/uplcv?utm_term=tintin+comic+books+pdf+free+download PDF link annotation
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/8cdb1064b88edb5e25fd717f6e9cc9e5/banopi.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607bff36833a2---26670002761.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1542e50ec2---26137655962.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/kc2qufqjsgbq53j14fpko876b5/50139865164.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/d5d28435482e1a0630d12d78b19c567e/mimokazemimetuku.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160741f51b6e0a---95343497263.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607124fcbe6b6---55232601038.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607962565f020---53186482662.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1e6e2a48e---jewize.pdfIn PDF document text
    • http://kinel-hunter.ru/upfiles/file/raguvotukevejovopigo.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa795984bc---8618912390.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16070bc3511e3d---ganibumiditagebi.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/fopazuda.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/e24e46fabb5842f22f85d46a784f8c40/lepanazoruvexi.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/2d4d85403e215b972aa3b11ca4924ae9/fobolejudeledatuzepemuge.pdfIn PDF document text

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