Malicious PDF — malware analysis report

Static analysis result for SHA-256 11be21f78de7ccf7…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 22:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b5b606dce90853470389d43b3258453f SHA-1: 7e3466c8859a1c5430342c323f4ef5bcc478e876 SHA-256: 11be21f78de7ccf72ca98d2e27599bed9e4aeeb1d0ddb3d16647050ff1d5f8c8
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9990

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/award?keyword=music+of+the+night+michael+crawford+live PDF link annotation
    • http://fitokaps.xyz/25380783846ogfac.pdfIn PDF document text
    • http://wildber.store/nizibawovasaxupzhho.pdfIn PDF document text
    • http://obschee.xyz/dune_4wd_boundary_swag_instructionskiavh.pdfIn PDF document text
    • http://usesol.xyz/hotmart_sparkle_o_quebq9pz.pdfIn PDF document text
    • http://cryogen.me/zumofokunavetag7v1jv.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/jehg0yr/11042671934.pdfIn PDF document text
    • http://usesucre.pro/16782640434licxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470387/normal_5fe591b127e4e.pdfIn PDF document text
    • http://yeswins.space/minalubadazadulina71v8e.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/zeworibuzoza/katulezinaxepalejipixazup.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/337038211.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/how_to_adjust_genie_pro_model_1024.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/benoxeva.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B5 5472 bytes
SHA-256: c2dbc5bea6215d31e5acfd07a1ce67a9047723776394014219af384fa056ad71
font_01_sfnt_off0000f53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53A 10648 bytes
SHA-256: 134993fd65d715f7be97be1081f82dcf126c401e2005e4e5d74f92fa25cd9544
font_02_sfnt_off00011976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11976 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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