Malicious PDF — malware analysis report

Static analysis result for SHA-256 416feaed4258ab8c…

MALICIOUS

PDF

56.6 KB Created: 2020-11-08 04:02:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a580db6936c7a6b5ec51e1be8f3543c7 SHA-1: 815221458ca15edeb4befab51d077293ddcd7a77 SHA-256: 416feaed4258ab8cc843affa7bf2d149410956fc96736a2e43375ff9f0f19d6e
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://traffset.ru/aws?keyword=hop+frog+by+edgar+allan+poe+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5f95f507ecbb0.pdfIn PDF document text
    • https://mubuwejazanewa.weebly.com/uploads/1/3/4/5/134585617/8b6d131959dded4.pdfIn PDF document text
    • https://kodowogokilikid.weebly.com/uploads/1/3/4/4/134466607/tonosapotuliri-nebuvumupaveki-fujabitalujukis.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/bofiko_wuserawojavu.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393364/normal_5f9874b5a0e04.pdfIn PDF document text
    • https://razixolinatu.weebly.com/uploads/1/3/4/3/134384461/4592149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371267/normal_5f89af5fcd6bb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://tatosotodu.files.wordpress.com/2020/11/relative_clauses_explanation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/065cf248-9ccb-43b8-9abe-783b2de3fa42/85757695197.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000933f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x933F 4892 bytes
SHA-256: 43433b410bd19536c0b5143bef20ef6ccafab03315bf620dc5a758496819a79d
font_01_sfnt_off0000a3ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3EA 10596 bytes
SHA-256: d6436fa3b81b44663cbdf99df0cca631850960450abde5220ded9726d2d71f94
font_02_sfnt_off0000c78a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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