Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab2b5c9970461e8…

MALICIOUS

PDF

67.0 KB Created: 2021-03-02 05:53:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 710753d86ff6c9accd48a72ae9e8a248 SHA-1: 787b47c4984faf36a23166e816542b93e5d3cd21 SHA-256: 5ab2b5c9970461e80215ae40e4444e2bbf48a22dc1e452c1bf4080581233ad77
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, appears to contain keywords related to car parts, suggesting a lure to attract users to malicious websites.

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://pelibifir.ru/award?keyword=2017+toyota+camry+custom+seat+covers PDF link annotation
    • http://ionatr.fun/charam_sukh_web_series_freeo6jk1.pdfIn PDF document text
    • http://pobesegu.scienceontheweb.net/vojaroma.pdfIn PDF document text
    • http://parhelifrl.space/community_helpers_worksheet_kindergartenzmhnm.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/papuxurekirugojupuxeli.pdfIn PDF document text
    • http://tixshopclub.fun/xagamuponalajigs5gvo.pdfIn PDF document text
    • http://counterman.ru/tafivekuxibomusaxckxnn.pdfIn PDF document text
    • http://lessonsonline.site/american_assassin_book_series_chronological_order08m5d.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/309590d8c.pdfIn PDF document text
    • http://mevuvil.iblogger.org/can_a_jeep_grand_cherokee_pull_a_trailer.pdfIn PDF document text
    • http://henrysavbr.site/osha_forklift_training_online_freeofi3b.pdfIn PDF document text
    • http://ninavadilu.22web.org/gowekakogozojukosimubabu.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/ggOhg4D/mifalelodogapejizagewes.pdfIn PDF document text
    • http://kezinogirojosev.iblogger.org/jonodupidi.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/id0jitU/cross_linking_recovery.pdfIn PDF document text
    • http://suniduno.iblogger.org/vupufubapefev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabulegewuwal.myartsonline.com/86166340865.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/bijuluvi.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_off0000ca39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA39 5388 bytes
SHA-256: b660a056493ebb01c24e62bf85a6babb187a248339b8b7162e45631c61210f5c
font_01_sfnt_off0000dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 10120 bytes
SHA-256: 1476560b483776351a1ec0e6dc8927b2593a9c14b05989b552255f7119067326

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