Malicious PDF — malware analysis report

Static analysis result for SHA-256 46b3ef9352174ecc…

MALICIOUS

PDF

79.5 KB Created: 2021-03-29 19:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 34fd38d0a9ac6366f5c005b15285b820 SHA-1: 58269fe319e2241ca1871627c2804b5002dde1a6 SHA-256: 46b3ef9352174ecc53082457d21f9c9ce81dc0cb52d92d9c06827d9c0dd4d6eb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many of which are SEO-optimized and point to PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are used to redirect the user to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/wix?keyword=2006+mazda+3+manual+transmission+oil
    • https://nelixifejesuvol.weebly.com/uploads/1/3/1/4/131406681/87f5cdac0424910.pdf
    • https://cdn.sqhk.co/mewuxedodi/giYgejh/37392747905.pdf
    • http://xilasojere.iblogger.org/35919838288.pdf
    • https://cdn.sqhk.co/giganopof/hjhlABK/slice_and_dice_meaning_in_tamil.pdf
    • https://bozaxemavokasum.weebly.com/uploads/1/3/1/3/131383719/pejumodufaru_tifilijugik_dusovufosajim.pdf
    • https://tiletemilowa.weebly.com/uploads/1/3/2/7/132710791/1962293.pdf
    • http://lafovawolifi.22web.org/54164965692.pdf
    • https://cdn.sqhk.co/jirudumom/SIhfogd/59070077840.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2daccc73-8708-4113-a26a-4f38906335d9.filesusr.com/ugd/f65175_7d7ab0a247d7447f8d595061b96ab4e1.pdf?index=true
    • https://s3.amazonaws.com/gorajikunobixi/borut.pdf
    • https://s3.amazonaws.com/gixirojozogufux/lagusagibaxikokitosato.pdf
    • https://s3.amazonaws.com/redegelesibif/97093685497.pdf
    • http://vudunebavibag.epizy.com/aluminium_casting_alloys.pdf
    • https://s3.amazonaws.com/jolunenafobuw/46620667778.pdf
    • https://s3.amazonaws.com/woneketelak/norilobi.pdf
    • https://c9977776-9e37-4432-9eae-e541147807da.filesusr.com/ugd/bb6cc6_97b173fd83c54802a028fcea2e0596a4.pdf?index=true
    • https://5c51e3d7-2896-491e-a255-1b002e356b93.filesusr.com/ugd/5b6ce5_a967cf6b0f914f0fa04d834a21bf29bd.pdf?index=true
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_448f254ea5944a2987cd43e1642c8fcd.pdf?index=true
    • https://s3.amazonaws.com/defujo/impossible_quiz_answers_question_48.pdf
    • http://pawegafed.rf.gd/free_angles_worksheets_year_5_maths.pdf
    • https://s3.amazonaws.com/rovikibixu/twin_bed_sheets_sets_clearance.pdf
    • https://s3.amazonaws.com/jasipefulaxiduj/heinz_white_vinegar_sds_sheet.pdf
    • http://zaxalamel.rf.gd/59833267648.pdf
    • https://b9eb3541-094c-4606-b101-17c2291fd6e1.filesusr.com/ugd/a18601_09bf4f81147c49339f08b2d164831e93.pdf?index=true
    • https://s3.amazonaws.com/vizegemawokaxe/zmodo_zp-ibi13-w_setup.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f76a.bin
ff8cdfe1c569d5a179cc75b98ba5cf0796aa7efe4bdc3fd3308e3a5fb07abfc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF76A 5520 bytes
font_01_sfnt_off00010a16.bin
c076257ee163bfa742d803ce6d9dd164542815f8e8b26c7322d4652c9eece1ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A16 11316 bytes

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