Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af3ac9a5e6a8174…

MALICIOUS

PDF

69.7 KB Created: 2021-02-11 15:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 45f917bbd6a79d5f203aca5d128cc22b SHA-1: e78d5ff23f6c10600f9f32f31f4aa435701638ef SHA-256: 6af3ac9a5e6a8174aa15ef02045defc824a279117033ad39d4cfdb530c7e9464
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://baarspo.ru/wb?keyword=bruce%20lee%20workout%20routine%20pdf PDF link annotation
    • http://hytri.com/gigozedelutefihqk55.pdfIn PDF document text
    • http://servempieza.site/cities_skylines_campus_downloadk68ne.pdfIn PDF document text
    • http://study-english-02.space/59382366666bz65u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371267/normal_5feb768ecdc88.pdfIn PDF document text
    • http://ketousa.site/arduino_mega_2560_r3_pinout0stg0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491410/normal_600c90bfc68dd.pdfIn PDF document text
    • http://mir23.xyz/36118444274lu6um.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_601c7aaf35ae7.pdfIn PDF document text
    • http://hamsterbig.com/48313382170t5kgy.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://regipikiwubadov.epizy.com/nuwiwod.pdfIn PDF document text
    • http://xijixabomama.rf.gd/28808318957.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/vafururiwogo.pdfIn PDF document text
    • https://s3.amazonaws.com/tunenijexe/bipewuselodejo.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/k_e_b_full_form.pdfIn PDF document text
    • http://zezinoretebeper.rf.gd/kgb_archiver_2._0_free.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_off0000d4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CB 4968 bytes
SHA-256: a9b9084b6d08e32a6eae56d63ac77137f81236f576dee957c5364368733ddf71
font_01_sfnt_off0000e5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DF 10672 bytes
SHA-256: 41d9010c550236dcd9d7e4283f1dfbf16c85393f3520d672f850f95d2829b8d7