Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a29034bf7b9a379…

MALICIOUS

PDF

76.8 KB Created: 2021-02-15 11:33:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3bc809fc04a5244ca72bb0a8c3f773b5 SHA-1: 17713b2b8abd921075fcd3f845c8cca7b1506d0f SHA-256: 6a29034bf7b9a3795c455103e20f3f01b86fc759a128ab6bee2c3f126a2caeb3
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://bologen.ru/123?utm_term=vizio+model+number+e701i-a3 PDF link annotation
    • http://jelolizabuvixi.22web.org/8390563158.pdfIn PDF document text
    • http://yourbigdick.space/avatar_full_movie_free_720plam25.pdfIn PDF document text
    • https://cdn.sqhk.co/linotepibubi/iXOgjvi/69475465548.pdfIn PDF document text
    • http://retaxigeg.iblogger.org/set_bitmap_size_android.pdfIn PDF document text
    • http://feruwikabi.iblogger.org/air_force_leave_carry_over_form.pdfIn PDF document text
    • https://xaviloxoganobe.weebly.com/uploads/1/3/1/3/131383750/zidofedodikuti.pdfIn PDF document text
    • https://linugezi.weebly.com/uploads/1/3/4/2/134265501/9164256.pdfIn PDF document text
    • https://fagisidide.weebly.com/uploads/1/3/2/6/132682833/rodisejat.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/PjbEZtb/how_to_use_the_crafting_table_pocket_edition.pdfIn PDF document text
    • https://kimimidinom.weebly.com/uploads/1/3/1/4/131453749/bilotomigizo-mofekabonubune-gatebitegosi-xoxul.pdfIn PDF document text
    • https://cdn.sqhk.co/jabuvilir/geLOhdj/cards_mobile_wallet_apk.pdfIn PDF document text
    • http://hookup158.fun/property_investment_plan_templatekibzy.pdfIn PDF document text
    • https://cdn.sqhk.co/letijefa/YPihUcH/romitovekenebiwijuwiviwos.pdfIn PDF document text
    • http://golosa-spasibo.ru/rotd_3_album_zip_downloadd62kj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/vyapar_premium_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/xesorowixawapuzoz.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/8960018987.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/battery_report_surface_pro_4.pdfIn PDF document text
    • https://s3.amazonaws.com/farokof/5150718986.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED10 5420 bytes
SHA-256: 77280ad8a52a7d21f7a3b90c54463ca07d957864b18d4a6b22d6445106594532
font_01_sfnt_off0000ff82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF82 10988 bytes
SHA-256: 431483a47b545680de8f4bf74ccd38dbdbf272c431b3f710cc0f5ad19444562d

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