Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3c8dde31d731584…

MALICIOUS

PDF

84.2 KB Created: 2021-03-30 14:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6d5aadba0ba10ebb85d1cd746932fc05 SHA-1: 4d48d6c210514b8721590ef477decf7620a06e54 SHA-256: b3c8dde31d7315841076d6a8635058263b4d9397e4886af36470390bd15b05bf
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_LINK_FARM' heuristic and numerous embedded URLs. The document body, though heavily obfuscated, contains references to car sales, suggesting a pretext to drive users to malicious sites. The ML classifier and ClamAV detection strongly support its malicious nature, likely serving as a dropper or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jottigo.ru/strik?utm_term=2018+lexus+rx+350+f+sport+for+sale PDF link annotation
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/2712a1691df80b.pdfIn PDF document text
    • https://midonoguta.weebly.com/uploads/1/3/5/3/135347847/ca3852679817d99.pdfIn PDF document text
    • https://padikolejak.weebly.com/uploads/1/3/4/0/134042397/5c50506f645fe.pdfIn PDF document text
    • https://vobinuxidixuf.weebly.com/uploads/1/3/4/4/134471365/b121a5758b0c.pdfIn PDF document text
    • https://cdn.sqhk.co/zumedizojas/7q3Oifr/59327250149.pdfIn PDF document text
    • http://wojisub.mypressonline.com/2003_ford_focus_zx5_review.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/2357341.pdfIn PDF document text
    • https://rozuguki.weebly.com/uploads/1/3/0/7/130775318/nerugiwu-lunifu-kebet.pdfIn PDF document text
    • https://suxokigivulumu.weebly.com/uploads/1/3/4/4/134479742/6780828.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/chcijh1/bubble_witch_saga_2_mod_apk_unlimited_everything.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/aschenputtel_geschichte.pdfIn PDF document text
    • https://cdn.sqhk.co/wimedizi/b4ohgiH/best_voice_recorder_app.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/novepoludewenet.pdfIn PDF document text
    • https://kibodoru.weebly.com/uploads/1/3/2/6/132695707/bakazure.pdfIn PDF document text
    • http://hytri.com/blackmagic_atem_television_studio_pro_manualrpak5.pdfIn PDF document text
    • http://akillidestekbasvuruformu.online/principles_of_design_rhythm_drawingooi1q.pdfIn PDF document text
    • https://xitodilizunew.weebly.com/uploads/1/3/4/1/134108755/5d0c2bade7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/honeywell_pro_8000_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/telegram_messenger_app_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/77757600146.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/kegivizivunibodiviz.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDAA 5404 bytes
SHA-256: b0bfa8767d779e9bae68e1d72eeeb69042e879f97eef5d16e2bbdfd440a9ca5b
font_01_sfnt_off0001101c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101C 10872 bytes
SHA-256: cadd9954eae6d79521ae9777741a1c63e9473fdd91a88d45dcf44a4131a494e1
font_02_sfnt_off00013554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13554 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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