Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff544c9ed1ba1a78…

MALICIOUS

PDF

81.7 KB Created: 2020-12-20 16:51:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 98cd8c98d3ef6174eeac413505382e90 SHA-1: ee4751251a6c7f45be607159777123ddfb09474a SHA-256: ff544c9ed1ba1a7898176c8045553a76ff102bf0f5226c3e1b54bd9348bd4e01
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs, with one prominent URL being 'https://traffset.ru/strik?utm_term=read+magic+pathfinder+2e'. The presence of a link farm suggests the document is designed to redirect users to potentially malicious sites, possibly for phishing or malware distribution, aligning with the Spearphishing Attachment technique. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/strik?utm_term=read+magic+pathfinder+2e PDF link annotation
    • https://komimuvupelogi.weebly.com/uploads/1/3/4/3/134312664/butase-riwizizoru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405929/normal_5f92790670b5f.pdfIn PDF document text
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/pitud.pdfIn PDF document text
    • https://burevojaziji.weebly.com/uploads/1/3/4/7/134729690/7304924.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5fa361df59305.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/982b5c1414c253.pdfIn PDF document text
    • https://bimozasobo.weebly.com/uploads/1/3/1/3/131398313/juduxisuv-zogowugimarav-wenimafokuno-lowijusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379732/normal_5f8d5b5936735.pdfIn PDF document text
    • https://zazivobonapi.weebly.com/uploads/1/3/2/6/132696398/7425841.pdfIn PDF document text
    • https://wotuvakarebor.weebly.com/uploads/1/3/4/6/134665633/rotobatuloxan-rujiwepigu-wujit.pdfIn PDF document text
    • https://xalorato.weebly.com/uploads/1/3/4/3/134317389/wofawojukuromamu.pdfIn PDF document text
    • https://ronizizuvuf.weebly.com/uploads/1/3/4/7/134707383/wuwizetuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408858/normal_5f986a9ca9daa.pdfIn PDF document text
    • https://wimixexaselu.weebly.com/uploads/1/3/4/3/134324609/811d4821f8891f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5434cbda9c57a97dae9da/t/5fcf1eb6505b451de1865361/1607409335323/strategy_pattern_c_autofac.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/65510655666.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/muzosodowugixesufurura.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_off0001025a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025A 5500 bytes
SHA-256: ae842013d55b4737f5d41768c65124f170e01c7309aed58f49dab6592a3b6b6b
font_01_sfnt_off000114f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F0 10784 bytes
SHA-256: f87097e8e46fb322783b4bfa1ddd99050e3bb5638047ad560e7308ab25fb0ce3

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