Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f72a757222395a…

MALICIOUS

PDF

83.2 KB Created: 2021-09-04 10:32:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2bcb1c6e695691ff57c5154ab57af469 SHA-1: e261e1c223e3b160372033f889b9bcabe2898bd6 SHA-256: 94f72a757222395aeded66e3ad80c03a4af947f3d3b16d2dd5f6159a8f270445
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised WordPress sites or disposable hosting. The PDF structure and embedded URLs suggest an attempt to direct users to external, untrusted resources, likely for phishing or malware distribution. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4523

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://chcial.ru/uplcv?utm_term=lidocaina+com+vaso+bula+pdf PDF link annotation
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/123cbdfafb5e822d1f2ba1eea5337265/gefepufegozuvupipolofukep.pdfIn PDF document text
    • https://seerupit.dk/assens/file/61372700685.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/53802772224.pdfIn PDF document text
    • http://dakmet.pl/upload/lodewuvo.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/14293793396.pdfIn PDF document text
    • http://starke.ca/clients/84205/File/84181865239.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/winalow.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/d684dc520e8836955beb1c53c34c6b35/88297835184.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/98292099082.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/4f771b263683092fe2d101ec5aed5585/weloviwazokiseromoz.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202108310035522929.pdfIn PDF document text
    • http://lmnn.ru/userfiles/file/97455963529.pdfIn PDF document text
    • http://poorclarescork.ie/images/39379952917.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/turexi.pdfIn PDF document text
    • https://medicabg.com/uploads/wysiwyg/files/93211100325.pdfIn PDF document text
    • https://tideandtigers.com/ckfinder/userfiles/files/48284736254.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e83a9064d7b---90730558688.pdfIn PDF document text
    • http://sparkpro.lv/content/file/77188067648.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fb21ab6d6---mezufu.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2a06aab449---45073352091.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16087aec76e49d---datisojetiziri.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121838c20c72---32207355940.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/jekimeb.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/o3ikplbv6pbch0g4ckseftkbki/xufodekimekepenezak.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/xopupabufefadibibaf.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16080a100605fd---89997399775.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 19796 bytes
SHA-256: 0901874f4320f6947d575c73d3b377a342371931d094ec1de6f567d5ae5aac10
font_01_sfnt_off000117dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DD 10712 bytes
SHA-256: 191cca644d4d44513e4ee8881b15654fbea87b44a51b608cb6103f3f13d7c070
font_02_sfnt_off00013027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13027 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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