Malicious PDF — malware analysis report

Static analysis result for SHA-256 744d378c7b5aafc1…

MALICIOUS

PDF

87.2 KB Created: 2021-09-02 19:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 162173ca53ebcce74cd30eee0c7649ea SHA-1: 43990f7bec7b3489189e5f0e5ced93c0255bfada SHA-256: 744d378c7b5aafc1dee5a2754d8d249c6907c254934979c37ca724d2ebe9052d
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The document body is heavily obfuscated, preventing a clear understanding of its direct intent beyond linking to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://alnadaoil.com/userfiles/file/tikalukekewupajovo.pdf In PDF document text
    • http://daehwa.info/uploaded/file/1808930194.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/25326983292.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/forabigokoxegavupa.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/d4a2245cd607cb0ea22b2dde07907f19/mibigiruj.pdfIn PDF document text
    • http://hillcountryawningsandsunscreens.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077f0f0c0b48---nejafutajupulizewesuka.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/32461134398.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/tewusile.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/7b979b382a0acdc4ec4af60412a3f1e0/ramumepanugidiwitavikepa.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607ebbd6ee9f7---gabibo.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b30a65211bc---7557974336.pdfIn PDF document text
    • https://psiakocky-potisk.cz/webpagebuilder/ckfinder/userfiles/files/kusovufuzumafelik.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/madezigixidofusul.pdfIn PDF document text
    • https://lacecinella.com/writable/public/userfiles/file/19786229823.pdfIn PDF document text
    • http://plncse.hu/php_data/file/duzokedupuwabe.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/tozigipejolo.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210529002109.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/13088023695.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae07c7c955---81461408487.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/f349e42e686149eba61cd67bb0588462/desuxutobibinagatelojika.pdfIn PDF document text
    • http://ipmarketing.net/userfiles/file/sowuviwile.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709b52efa43---32441833596.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/94058856964.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=o%27reilly+learning+spark+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_off0000e96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001017d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017D 20248 bytes
SHA-256: f59e6a6a7ade1efd97f454f92d31fee9c3cc834cf7f8d9d817017dda10e010eb
font_02_sfnt_off00013684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13684 10720 bytes
SHA-256: c710bcfb8a9c6b487c293d2a761b3658a3d1b2d6aad13f60a23d4f419fa93120

Open this report in the interactive analyzer, or submit your own file for analysis.