Malicious PDF — malware analysis report

Static analysis result for SHA-256 251aee2093a83ab7…

MALICIOUS

PDF

72.5 KB Created: 2021-01-29 00:14:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 201e5e3ff2e77e6d397c304b3ad507cb SHA-1: 4dc2d95daac158c71d9ebbacf0db86ab8b3793d2 SHA-256: 251aee2093a83ab732026914b0531695b42f1f5fc88889cb781d6b2326874a1f
206 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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=starcraft%201%20free%20to%20play%20download PDF link annotation
    • https://cdn.sqhk.co/fesakesovoka/ihXs5Tm/limeduxunepewes.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/ieihwha/25997118084.pdfIn PDF document text
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/dipomader_jufotezaralomul.pdfIn PDF document text
    • https://siwelizotelet.weebly.com/uploads/1/3/1/4/131437983/cfcb5ead.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408991/normal_600c97f42db01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387813/normal_5fd7a8c063ba9.pdfIn PDF document text
    • https://cdn.sqhk.co/milibotobov/u1Agcig/monkey_ropes_course_new_hampshire.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/tikolovewene.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369165/normal_6000d0cd1cb83.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455198/normal_5ff51dad778bb.pdfIn PDF document text
    • https://forupiwiwipugo.weebly.com/uploads/1/3/5/3/135349306/d2542.pdfIn PDF document text
    • https://zaxewunatomilar.weebly.com/uploads/1/3/4/1/134131499/0ed296e0b0bcde3.pdfIn PDF document text
    • https://cdn.sqhk.co/rusobotakox/dnb5Zha/download_bonetale_fangame_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/romemanir/lggz3ii/sniper_games_xbox_one_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kevava/defaresopupusubabijirubi.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_off0000de27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE27 5320 bytes
SHA-256: 63001bf7949ca2d0f90abf41e7bf3b63a99b6d9ea6632851cd9d58b3007a58ef
font_01_sfnt_off0000f068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF068 10748 bytes
SHA-256: fd52d4a88b0dc0827aa898701a6c734aec7425d71087b89c179dcc577ec573fb

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