Malicious PDF — malware analysis report

Static analysis result for SHA-256 041f2a21f1d350ba…

MALICIOUS

PDF

70.7 KB Created: 2021-02-17 19:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4ffb91f2040bba77250fdbd0d23e4c22 SHA-1: 8203d4920cc215351823fae7f71076a030bcc1ae SHA-256: 041f2a21f1d350ba25d3863fe49a2928de917b6eccf7ce764202ec3e5c1fdc25
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=killing+chloroplasts+answer+key PDF link annotation
    • http://vabuzunaseridal.iblogger.org/95932318341.pdfIn PDF document text
    • https://fuwiposodunumof.weebly.com/uploads/1/3/1/4/131438128/237af25.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470028/normal_5feea24a3870f.pdfIn PDF document text
    • http://legalvictory.group/xizotakopemewugenowiwu5b7n8.pdfIn PDF document text
    • https://bitoranajezope.weebly.com/uploads/1/3/1/4/131453137/muwekugenu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368996/normal_5ff9e279a0725.pdfIn PDF document text
    • http://clebohets.xyz/6233210734uuy2j.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421768/normal_60243dea585ca.pdfIn PDF document text
    • http://tlgfree.xyz/91266657281ia3jl.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/b2f583.pdfIn PDF document text
    • https://paparudedolenod.weebly.com/uploads/1/3/4/6/134686514/8900655.pdfIn PDF document text
    • https://jefanumu.weebly.com/uploads/1/3/4/8/134889008/8e8bdb058.pdfIn PDF document text
    • https://telabafulux.weebly.com/uploads/1/3/0/9/130969700/5675820.pdfIn PDF document text
    • https://woxisuxifajise.weebly.com/uploads/1/3/5/4/135400236/tesofapofa.pdfIn PDF document text
    • https://kakagigaj.weebly.com/uploads/1/3/4/6/134684555/wuxufuluzunowoxek.pdfIn PDF document text
    • http://cesaregaspari.com/beerappa_oggu_katha_songs_naa_songsqu3up.pdfIn PDF document text
    • https://fuxilidunud.weebly.com/uploads/1/3/5/3/135314653/wufiduxov.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/nagudo/beer_bottle_labels_template.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_off0000d85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85D 5420 bytes
SHA-256: 33142fe91208f5d9e17e32fb58cdca969a8611ef7e5a9f315682336d0fbe4ee8
font_01_sfnt_off0000eae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE3 10136 bytes
SHA-256: 964aa88f030a3d45de43d1edf9ed25e46648a9e9f2f55204d3d7afe158c65851

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