Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f6db8409ae90236…

MALICIOUS

PDF

76.8 KB Created: 2021-03-29 22:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 30bc80abceb2b96f45bb3776d3bc6054 SHA-1: a00b36b6fa5f3ebbaf7eada92117a736b54701ad SHA-256: 5f6db8409ae9023685b7442eeb59da271373eb5cf21b1e504f49eca73bbfef40
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, a tactic commonly used for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://zajinet.ru/wix?keyword=smithing+guide+1-99 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392195/normal_606062705b1d9.pdfIn PDF document text
    • https://cdn.sqhk.co/wesifarajaru/ii9Akuk/draw_it_too_fortnite_characters.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_5fdb51c16b0af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_6020d0eb5a5d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503584/normal_5fd0910a34881.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446388/normal_6024cb26db5a2.pdfIn PDF document text
    • http://fidofawi.medianewsonline.com/pofuvixid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446289/normal_60193711d9b74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_603acc507dc82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445736/normal_60037aed12e59.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/what_is_the_best_call_blocker_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/6OcxFyy/house_party_eek_games_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/hdgcVFo/ragnarok_tactics_skill_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jemukiguwuw.myartsonline.com/fidelifadavanuramibox.pdfIn PDF document text
    • http://detuzojezil.rf.gd/third_conditional_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d86fa49-4e1f-4d74-9019-beec235137d1/bixiduzonefizuduso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dda785c7-7503-4e92-9566-594523306d96/pioneer_vsx_821k.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5de794-2ea5-4c0d-93cd-a3f6fbe0ed37/67169550237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf0963e9-5256-4aad-aa0d-6d4a859245d0/cual_es_la_causa_del_vertigo.pdfIn PDF document text
    • http://pimubejat.epizy.com/human_rights_watch_world_report_2019_guatemala.pdfIn PDF document text
    • http://fexenisidewa.rf.gd/flexible_pavement_design_aashto_method.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_off0000f02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02D 5064 bytes
SHA-256: eca083dca59613e670a8dfb763cbe2dfd066d8b8025d2bfcac7c042e34a47d6d
font_01_sfnt_off00010157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10157 10668 bytes
SHA-256: ce5e679d5088282c221d0648bb5c1f135b091ab2b5b3a9ca4c9549e94133e52a

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