Malicious PDF — malware analysis report

Static analysis result for SHA-256 c083f388302ec1a6…

MALICIOUS

PDF

69.1 KB Created: 2021-01-20 20:02:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 8dfffe59ae5992b574933832108f4d04 SHA-1: 5c9b1bca4f1a316b4993e5c13d955cbcb409daf5 SHA-256: c083f388302ec1a6f7ee69833130d78bfffe7b403a0f6de21b0a32f179a9fc1a
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://leonvi.ru/wb?keyword=ninja%20gaiden%202%20iso%20download PDF link annotation
    • https://cdn.sqhk.co/jukapaba/CFghxgg/nyc_311_app_android.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/dIlX19g/gibuxusibiroxobasugob.pdfIn PDF document text
    • http://wutoxurusot.iblogger.org/levojijiraxu.pdfIn PDF document text
    • https://cdn.sqhk.co/mirofifuba/9iegihf/cheap_online_shopping_uk_food.pdfIn PDF document text
    • https://kigusokitog.weebly.com/uploads/1/3/5/3/135300221/e69328332f1f2b8.pdfIn PDF document text
    • https://cdn.sqhk.co/lilapanorup/EX2bphi/sound_decibel_meter_home_depot.pdfIn PDF document text
    • https://cdn.sqhk.co/fekawifen/sRy9hax/vutubobivemanatexixemibu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475562/normal_5fd14d58658e7.pdfIn PDF document text
    • https://lisebilapuwuw.weebly.com/uploads/1/3/4/0/134096741/kuput.pdfIn PDF document text
    • https://xetetikagidol.weebly.com/uploads/1/3/5/3/135308020/3769918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f8f2200c0748.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zejowupifodoj.rf.gd/south_iceland_map.pdfIn PDF document text
    • http://vanabigura.rf.gd/acg_guidelines_for_esophageal_varices.pdfIn PDF document text
    • http://kabitivawenavox.rf.gd/41944412436.pdfIn PDF document text
    • http://lobidirubegevil.epizy.com/miracle_box_2._82_crack_loader.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_off0000d216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD216 5168 bytes
SHA-256: 1aa8185fc42b4e5345dee8321577099324f7e4c7e02f40da2f55a570877ec563
font_01_sfnt_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 10456 bytes
SHA-256: 6f80118fc9d3a6154a19fe2fab295b36cfc1b7bf4da6a113d0565fcb46addaf8

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