Malicious PDF — malware analysis report

Static analysis result for SHA-256 38df723f9874a864…

MALICIOUS

PDF

69.5 KB Created: 2021-02-28 17:59:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 7d1746a7d8e28b6fde5d8730d85ca598 SHA-1: b16d59581c8590fad93a480797fae544171be881 SHA-256: 38df723f9874a864a27efbc23d4dd70d95e925df51b4a4bcb3bb95363b76e10c
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://druttle.ru/wb?keyword=dell%20optiplex%20790%20i3%20cpu%20upgrade PDF link annotation
    • http://idealica-ufficialeitalia.website/nj_new_years_eve_2016z8mnk.pdfIn PDF document text
    • https://telavepifamika.weebly.com/uploads/1/3/4/3/134352802/1237960.pdfIn PDF document text
    • https://xamonato.weebly.com/uploads/1/3/2/8/132814301/5243531.pdfIn PDF document text
    • http://idem-peshkom.ru/nakegalumlong1.pdfIn PDF document text
    • https://vusokozederik.weebly.com/uploads/1/3/4/9/134901716/rarekosevinugulegeke.pdfIn PDF document text
    • https://mirulunus.weebly.com/uploads/1/3/1/1/131164386/3fa8ce77bb9db8.pdfIn PDF document text
    • https://wibizoginoj.weebly.com/uploads/1/3/2/6/132681485/wuban-lapolepitedaxi-sijorelode.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/iglTidA/gizekak.pdfIn PDF document text
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/8983704.pdfIn PDF document text
    • https://lebabipiw.weebly.com/uploads/1/3/0/9/130968925/kekuzuporix.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/7PMsmTw/61435177205.pdfIn PDF document text
    • http://kismyketio.com/15827065050zckff.pdfIn PDF document text
    • https://kobivepetere.weebly.com/uploads/1/3/1/8/131871499/592576.pdfIn PDF document text
    • http://italiahot.fun/jewutobixidewofaxitejijivu5c8.pdfIn PDF document text
    • https://biwasigefo.weebly.com/uploads/1/3/1/3/131398444/9707650.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sapakebozo.rf.gd/sakiwuxudasabikojol.pdfIn PDF document text
    • http://ritajegowi.epizy.com/luces_de_bohemia_selectividad.pdfIn PDF document text
    • http://zenudaxefuk.rf.gd/halo_beyonce_instrumental.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_off0000d000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD000 5672 bytes
SHA-256: ee477b28fdc110dba511069b3745916acb7d19f82d8df1c3151bf62e402b6ab0
font_01_sfnt_off0000e36d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE36D 10532 bytes
SHA-256: 17b4c4bd2a192daece85944b979109b1427fe55b34a0c131e1d2fba06e70961a

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