Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a932124d7ef83a8…

MALICIOUS

PDF

70.0 KB Created: 2021-01-30 19:56:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 83b5f85f6aaa77f24b9096374c3b908d SHA-1: 498181be2bc84aaaccb0919e2666c273804913d9 SHA-256: 4a932124d7ef83a8ad9e6a6359973b7405a4090f406936a32e6c6507962f6fab
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://jacksth.ru/wb?keyword=247%20curtains%20discount%20code PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367286/normal_601536badcad7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427077/normal_600b13c39b5e9.pdfIn PDF document text
    • https://jepuderakemuso.weebly.com/uploads/1/3/4/6/134666912/4912673.pdfIn PDF document text
    • https://cdn.sqhk.co/someteku/hhghsI2/blade_bouncer_mod_apk.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/bozatevuvopuvevu.pdfIn PDF document text
    • https://joripirido.weebly.com/uploads/1/3/0/7/130776040/5388081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458163/normal_5fd66f2742913.pdfIn PDF document text
    • https://tedofejufada.weebly.com/uploads/1/3/0/7/130775935/memijega_jifokefugagilis_kavimalizaw_tanonefere.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413242/normal_5ffb21152aaff.pdfIn PDF document text
    • https://sajosapisede.weebly.com/uploads/1/3/4/3/134344890/wemofero_vekerapifog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_6012955e55958.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/hhnjihb/osu_duo_mobile_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485321/normal_5fcbfe108e32f.pdfIn PDF document text
    • https://cdn.sqhk.co/xajimujigaju/ji76Vif/alienware_keyboard_aw768_how_to_change_color.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482645/normal_5ff68c82f17fa.pdfIn PDF document text
    • https://cdn.sqhk.co/balekunu/TggWjez/felezedinizokoseribes.pdfIn PDF document text
    • https://tozikogok.weebly.com/uploads/1/3/5/3/135330875/0e38e8c899988d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371261/normal_600735c03132e.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_off0000d6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6E6 5104 bytes
SHA-256: 8e27f8b8b7a8995205534327b806fa46fb0537af3202ef31528258e0848f5f66
font_01_sfnt_off0000e857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE857 10228 bytes
SHA-256: 3bf2a0c763b30bea407ceedf0415ba083dbe0a2dad8c6fb453c45a72e43479b9

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