Malicious PDF — malware analysis report

Static analysis result for SHA-256 4540711167e29b66…

MALICIOUS

PDF

72.3 KB Created: 2021-06-16 06:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: f994e0aac589b94dcb8d3d1da5ff2571 SHA-1: c056b10dff920a3beeca053c0f872131f7cda069 SHA-256: 4540711167e29b660c0e85119736d0193a7dc4718d941f84b8704fb6bd677dbd
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, likely intended to distribute malware or facilitate phishing. The heuristic firings indicate a high likelihood of malicious intent, with ClamAV specifically flagging it as a phishing trojan. The embedded URLs suggest a lure related to game cheats, aiming to trick users into downloading malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9630

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://pistant.ru/uplcv?utm_term=gta+vice+city+bodyguard+cheats+download PDF link annotation
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/72169f375065ebc01fc5e2f7826049f8/13377880139.pdfIn PDF document text
    • http://topas.lt/userfiles/file/sovajinodewebazarakopokus.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097cf987d7f3---wepipok.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1df65168020148fb5a7a03175c6b1cd2/xugalen.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9c736034b---jiloxerolu.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/lebefilijabimabugarod.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a37b84022f4---29786316648.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8a76601765---liposasuluwonanapojufu.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16072434848252---fexuxufudasevafavoponabet.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/6psla52m56u6gbsnlf8f1kmrfe/bapopimiwaremalewuw.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfaa4826ec---90691229128.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/6589e277ecf9303d9ff4f2687c3a5572/2187521974.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/xuvusadefadivu.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/2d65d129a0b72c5d2e3f8bc8b7889994/tosewumuximonumojifexa.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/8cb8806e8d6d1ec4bbbd256644a9dbc1/51977047841.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EE 5628 bytes
SHA-256: 041726d72a19d510acdcd7a77720c3fa6f1e387a43136ecb7ca23b4f032aa278
font_01_sfnt_off0000fb24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB24 10608 bytes
SHA-256: b9f104dca7fc5a0e4d349f550378f5afa5a785489997f0ec032e634efba100ec

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