Malicious PDF — malware analysis report

Static analysis result for SHA-256 630b6ffd4563cd8e…

MALICIOUS

PDF

85.9 KB Created: 2021-05-25 08:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: dfa42edd3908e04665d5ee9ef644cc9d SHA-1: aa5cbacd1bd531bbe9f452850c0652900e0e6d84 SHA-256: 630b6ffd4563cd8eea79c880d6a51773e2c89244132b19f02c81359dc45ef12a
154 Risk Score

Malware Insights

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

The PDF file contains a link farm that directs users to multiple compromised CMS upload storage locations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of numerous links on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8375

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://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609247e8d4b93---gagudefabazipumafip.pdf In PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085888372c76---50370336922.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b35dea1d863e840c4b913adfad4f522a/45635654350.pdfIn PDF document text
    • http://amdind.com/userfiles/file/zevagonirurixa.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef15e97e17---48617575795.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607abfed691a1---gogipofewina.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/6bd519f99fae6429b3fac11a1c36f422/totavufutamapikupujise.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/rovenirinelanabopunimix.pdfIn PDF document text
    • https://djennebeads.com/nbloom/fckuploads/file/mataxak.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/50728035032.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d6804e0ef6---9322004054.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d2bc67c19e---47256733779.pdfIn PDF document text
    • http://absigorta.come/file/12599582321.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c87b4c388d---92370832919.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/90dd90f3ef9d714d24994f4021ed66b7/77343397696.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32bc703271---nobufagifote.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/22f91fc53e0a882c4b5a1e15906bf9f3/6095706833.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1606e4c2472efd---lemufe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=which+reverse+osmosis+system+is+bestPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FD3 5112 bytes
SHA-256: 23a7d1ba80593e65a5ce91347f5ee5c97512bc8337fb3eb99e47e66ac452746a

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