Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82ea46190579765…

MALICIOUS

PDF

84.5 KB Created: 2021-09-02 15:04:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2544116269ec360ec7e3a2b1817c482f SHA-1: d1aef26b57cce2fe36bc171a1cf3e95c6b31e5c7 SHA-256: c82ea46190579765693b4a5d97e31955df5bdcde1d43815877b1463ffc864f11
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm with numerous URLs pointing to disposable hosting and compromised CMS upload storage, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URLs are indicative of a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 http://moneymaker-gold.de/files/36485551650.pdf In PDF document text
    • http://goldcoil.com/uploadfiles/files/tusogezekuxexepedelajodix.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/fitanoso.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/151039e131d40fa3ffe0b75391b85a8c/fibolizomapinidasevav.pdfIn PDF document text
    • http://betonkeritesek.eu/Content/files/kibijoma.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077900172752---vanurepizowejuxapufili.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/pinosik.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/tuvapojufixinuretixode.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/16116281b54b5d---supadudaja.pdfIn PDF document text
    • http://tulga.ru/editor/files/fozomedevolarurugojoda.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4a1d3f92d---kikazuxupafudotalerax.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f32ff00c63---17917386194.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8caaf2b83c---zumawutuvutu.pdfIn PDF document text
    • http://apple888.vn/luutru/files/50725002372.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/solofumolil.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/aa8c87a1d10224269a28e9425deb9444/vuwamuwo.pdfIn PDF document text
    • http://vodnik48.ru/content/file/78402971260.pdfIn PDF document text
    • http://dhsclassof70.com/clients/d/d1/d13f49183e6b2ef720c1f353b43de0f2/File/riforosadajibureb.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/9lpsi0ejjbgjflsmqp9ne98ma0/75152887038.pdfIn PDF document text
    • http://tl-maskinfabrik.dk/userfiles/file/nojipiverojatetoni.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/gesorikifikizis.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/92235085319.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/duqa9vmdfss6a2vsne5vjvjqmm/mulaleror.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ten+oxherding+pictures+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000e5b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B9 17548 bytes
SHA-256: 3ad9064d311580b55bfc32d52f454548c0c0ab0a538f9b02c8486fb0f5735435
font_01_sfnt_off0001133d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B54 10856 bytes
SHA-256: 7f62b120ffdb46c8b9592afa770acc05c05f39a2eddd39487c0822a343264e03

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