Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ae7fe6585d7c983…

MALICIOUS

PDF

80.4 KB Created: 2021-09-03 20:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1237b96fb1fdf89c82983e51011ac77e SHA-1: 778fdb9da4be5737ee00bf34333a54d0cc8208b1 SHA-256: 2ae7fe6585d7c983b8692d38e4cf2b3a98d7ff9152cc9d5851d1c22d110a5450
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the presence of external links and the overall structure indicate an attempt to exploit users through deceptive redirection, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://oniceh.ru/uplcv?utm_term=malocclusion+of+teeth+pdf PDF link annotation
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719a3e1ecc4---xaxokokajuxu.pdfIn PDF document text
    • http://kirakuramenandsushi.com/uploads/files/mexesi.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948312f105d---59773586864.pdfIn PDF document text
    • https://nepalaviationmuseum.com/userfiles/files/tovutawunakirezix.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081a95a51619---rixutajodukakatonukatevav.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/retutotevisevovemej.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa7fa410b8---86026628945.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16119d114d76f4---10802808684.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/50845604025.pdfIn PDF document text
    • https://sukhayurveda.in/userfiles/file/refekosibikifotutaxoze.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4d0677001---sezibivevinuguwumis.pdfIn PDF document text
    • https://oklasik.com/ckfinder/userfiles/files/fiwizufupilatefa.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d18730699c---95966649578.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160c488b2ac0ff---golekulu.pdfIn PDF document text
    • https://deycaterers.com/ckfinder/userfiles/files/fasan.pdfIn PDF document text
    • https://amatnieks.com/pictures/image/50105887434.pdfIn PDF document text
    • http://kasargod.net/uploads/file/65669592041.pdfIn PDF document text
    • https://clubslotalmatriche.com/calcas/file/94386577892.pdfIn PDF document text
    • http://duonglaohanoi.com/userfiles/file/70636387252.pdfIn PDF document text
    • http://kccmaul.com/files/files/rarulibuno.pdfIn PDF document text
    • https://ingmarcomantovani.it/file/vitanuxusuv.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/28a68pnp0h0jb4d3oloe391jb7/nofivoxusejegokumewib.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/meh33ne0s9qffbaemcvliac6ot/mesilatebubirima.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba02258bdd9---sorinisowo.pdfIn PDF document text
    • 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_off0000da02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA02 10708 bytes
SHA-256: 7f4a68e72472ea08d55506bb94b87f90acb7e283f46fb81c2313d8863c11dcc6
font_01_sfnt_off0000f287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF287 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A99 16132 bytes
SHA-256: 68ae65721e959a8a9b560dbf34a9d01e642591146cb1e6863ad59de03c93cd71

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