Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e42318c377d91f2…

MALICIOUS

PDF

69.9 KB Created: 2021-09-24 05:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2eb135d22456e9994ada9cf74307725e SHA-1: bcd25fedea94b08751ef478651dafab8d0300aec SHA-256: 4e42318c377d91f2efe20fbf560d4cf648ff844ad170e3efb8e9440e7a3aaa2b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs pointing to various domains, indicating a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of external links suggests an attempt to redirect the user to a malicious site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://crewmak.ru/uplcv?utm_term=iphone+12+pro+in+bangladesh PDF link annotation
    • http://bygreenpure.com/userfiles/file/kodejawomogemekapokom.pdfIn PDF document text
    • http://xingzhongjing.com/userfiles/file/20210923145623_1840080087.pdfIn PDF document text
    • http://sirindhorn.net/upload/File/26074017469.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/21502872181.pdfIn PDF document text
    • http://esrafisek.com/images_upload/files/nozovojonegazojifufanaw.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/37422158605.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/karovafotav.pdfIn PDF document text
    • https://www.le-domaine-de-hauterive.fr/ckfinder/userfiles/files/83922572983.pdfIn PDF document text
    • http://wohntraumgmbh.at/1047845003.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/renesi.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/tonesosoxis.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/20686252392.pdfIn PDF document text
    • https://oolong-dining-co.com/webroot/editor-uploads/files/pemekomukemivitim.pdfIn PDF document text
    • https://abyway.lv/images/ck_images/files/16400017828.pdfIn PDF document text
    • https://hanyauntuktesting.com/contents/files/vuxevatat.pdfIn PDF document text
    • https://dzido.pl/userfiles/file/kivod.pdfIn PDF document text
    • https://smartcirclegroup.com/userfiles/file/muzonolonusuwunamibiz.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210920_3D96B950B8B74775.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210907222200.pdfIn PDF document text
    • http://www.tecnologycenter.com/admin/uploaded/fck/file/pemewal.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/sumenafitifabuvojefugita.pdfIn PDF document text
    • http://didula.com/img/file/93587606302.pdfIn PDF document text
    • https://lean-ds.com/upload/editor/file/63839613935.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134cd1cbc408---71172878729.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_off0000b47b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB47B 14588 bytes
SHA-256: ffd9333ef6389256feace8fb400674806f2dfce1d3c51e54cda50e48b50ecf7a
font_01_sfnt_off0000d930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD930 10836 bytes
SHA-256: d9762c29d39f05211767730e79d6568e578191b761677ab2a4171f13b2e74c53
font_02_sfnt_off0000f1ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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