Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b8c6c34bfc6fe9b…

MALICIOUS

PDF

68.2 KB Created: 2021-03-09 08:18:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3fdac23758dd1e3e742c48cc97bdb4bd SHA-1: 16620d1b9167b4bb556a78c037a026dc9334847d SHA-256: 0b8c6c34bfc6fe9b447ac307a6d53bfa74dd23321b4b8f12ba2e232392159668
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://botokaw.ru/strik?utm_term=stihl+024+av+super+chainsaw PDF link annotation
    • https://denogowozule.weebly.com/uploads/1/3/5/3/135326247/3ee27.pdfIn PDF document text
    • https://cdn.sqhk.co/zevinikiwi/jjbiiSx/sutex.pdfIn PDF document text
    • https://cdn.sqhk.co/zatufora/gihiKZ0/download_major_mayhem_2_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/jcQU1hf/license_plate_check_app.pdfIn PDF document text
    • https://cdn.sqhk.co/dagufiwus/Aiche3W/91836135798.pdfIn PDF document text
    • https://vonebofakakare.weebly.com/uploads/1/3/1/8/131856314/8654539.pdfIn PDF document text
    • https://cdn.sqhk.co/konumapedowe/hg4jhfg/74950009752.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/Xifgwia/pregnancy_belly_measurements_by_week_chart.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/vuliwisuwig/42776415014.pdfIn PDF document text
    • https://c788b29d-df2d-4d46-9946-349e8cce89b7.filesusr.com/ugd/a9e086_6f41fd824bf94eeb8c0797dcd5bb1f21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/joterige/sufowubovudamifen.pdfIn PDF document text
    • https://1c54689f-8f60-44d8-8d81-b144d6ea8ada.filesusr.com/ugd/787b0a_f739b770abe547c59bdcbf976f3ebb78.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/4166321877.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/65857265113.pdfIn PDF document text
    • https://49b7c339-fea6-4bb3-bf7b-ca47af5263df.filesusr.com/ugd/6ca12d_8cfa0b00ebf041f49fa1da44437b5819.pdf?index=trueIn PDF document text
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_8dcb5e0433764e0b8b060a6df265b3f3.pdf?index=trueIn 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_off0000cdb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB8 5640 bytes
SHA-256: c22b78fc548f316a9249546e317375a397691dcf35baed742032b85b223833fd
font_01_sfnt_off0000e102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE102 10556 bytes
SHA-256: 516324efa2df3b89d9937d173a4bebfd5fe355f1b2db8de87ae472f53a77b303

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