Malicious PDF — malware analysis report

Static analysis result for SHA-256 57f659a1f3833339…

MALICIOUS

PDF

72.1 KB Created: 2021-02-24 21:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4c1f6dea8aa2fb5e48c79858e935e779 SHA-1: 058ae4bc3d03f442dd7887bcbb2593797a1e57db SHA-256: 57f659a1f38333393eabc166cd165ea739ad9d996b53ae61580c0bf1703108f2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://seumenha.ru/award?keyword=2011+dodge+avenger+heat+tire+size PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367911/normal_60176c89cb6e2.pdfIn PDF document text
    • http://fimewot.xyz/87463390553v72bt.pdfIn PDF document text
    • https://velalozelo.weebly.com/uploads/1/3/4/4/134498802/4319634.pdfIn PDF document text
    • http://detonicro.website/acca_past_papers_f8_june_2012bf0nq.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/c6a61.pdfIn PDF document text
    • http://topsale.pro/ncert_political_science_book_class_11_in_hindi370fe.pdfIn PDF document text
    • https://nujiwabovis.weebly.com/uploads/1/3/4/7/134728222/niximozikoluxo.pdfIn PDF document text
    • https://misamizejip.weebly.com/uploads/1/3/4/3/134348089/sonobomesoruwul.pdfIn PDF document text
    • http://praktika-ingenieur.com/3707269073374f3t.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/f63c0e9d173.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/zolurumaratupizeguta.pdfIn PDF document text
    • https://gafibuludumogid.weebly.com/uploads/1/3/1/4/131453415/8277f1d11.pdfIn PDF document text
    • http://harmony-market.ru/john_deere_212_snowblower_manualt3gen.pdfIn PDF document text
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/d4ff6eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421201/normal_5fd93b9990e2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505102/normal_600f1ea99a3cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490547/normal_6026c2b521301.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419836/normal_5ff4970850cb3.pdfIn PDF document text
    • https://vusexojepaxeva.weebly.com/uploads/1/3/4/0/134096357/firufudeveg-tikegelosuvof-kunexizikelobox-mejob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ddd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD3 5396 bytes
SHA-256: 0d7e200d9a7bd86268f51f94f9ba74b264b47dcf295e9a5a9f7f9680780d5a06
font_01_sfnt_off0000f036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF036 10264 bytes
SHA-256: 8bbe1bad4aff9a52cbcc6e7e5c82fab4d768d5f7da74b64ffc75011cf1937553

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