Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8c5f134b45d6bd…

MALICIOUS

PDF

72.9 KB Created: 2021-02-13 15:38:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ac0887d4d7147cbcc10c45f3276657cb SHA-1: 5088fdc6d6bfdae802a7b12de2ea64eb7d34e387 SHA-256: fd8c5f134b45d6bd88d3d9113bf33fef5ec32ced5fab7e8a2b0501c3273d319f
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=vegetasi+yang+menyusun+formasi+barringtonia+adalah In PDF document text
    • https://cdn-cms.f-static.net/uploads/4475572/normal_6013aff6700d1.pdfIn PDF document text
    • https://bizotimugir.weebly.com/uploads/1/3/1/1/131164076/60f423a8c7.pdfIn PDF document text
    • http://jogedisilokazex.iblogger.org/brick_bonding.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369796/normal_5fe5b1a7af16b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454306/normal_600a9954c243a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447085/normal_600e0be1ee66c.pdfIn PDF document text
    • https://vevofuxideg.weebly.com/uploads/1/3/1/4/131405958/7833068.pdfIn PDF document text
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/sunojome.pdfIn PDF document text
    • http://nokutanebufevon.iblogger.org/kobakanevipewejibebazo.pdfIn PDF document text
    • https://cdn.sqhk.co/jujejorule/egcijih/85616982399.pdfIn PDF document text
    • https://wojawodexof.weebly.com/uploads/1/3/4/6/134673733/852c8.pdfIn PDF document text
    • https://gavixidosoxadi.weebly.com/uploads/1/3/0/7/130776067/134e6c.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/jBhdmia/wizunuwanalexeruvaxekine.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tirawuko.rf.gd/marine_navigation_apps_for_android.pdfIn PDF document text
    • http://xifedesekelogu.epizy.com/favagekowezogatejilufab.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_off0000deee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEE 5528 bytes
SHA-256: e18ba5f273096e173430f6058b45128630c35bf1df58b14d18be72ec0894e57b
font_01_sfnt_off0000f197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF197 10228 bytes
SHA-256: 8af339be517500c6500370c004c3a1c8460cd6e71c5d10058613ff4e80421157

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