Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e88a880955f5891…

MALICIOUS

PDF

59.9 KB Created: 2020-11-19 00:25:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f34cfdad06a62edb5d2ae59a54dcf70f SHA-1: edf5b9ec11d80f627fcafe224a5269da686e4ac2 SHA-256: 1e88a880955f589189c977b32e8bfcb73e8fae7833c34c9368a3ac6ca649b69b
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://gettraff.ru/123?utm_term=milled+eagle+unblocked'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://gettraff.ru/123?utm_term=milled+eagle+unblocked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414486/normal_5fa117cb3b77d.pdfIn PDF document text
    • https://lixobanifalito.weebly.com/uploads/1/3/4/4/134443724/lozefoviwazukesof.pdfIn PDF document text
    • https://jovikuveditowe.weebly.com/uploads/1/3/0/8/130874612/metavon_runokip_fisezefidiwade_kujis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5fa78d06d1fa3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415326/normal_5fb0359d78ba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f8b47daa12af.pdfIn PDF document text
    • https://domalaxugopomi.weebly.com/uploads/1/3/4/6/134606687/2410052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377098/normal_5f8b3ba31efac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f9beb7cce5d0.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/fosagoba/favebelabonupixo.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/29595877720.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/31080362179.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/elementary_season_5_episode_23.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_off0000ac3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC3B 5040 bytes
SHA-256: f63a1fe9668ea6ae6e089c694f0ac0c1fd639d1adae15e289ce78163f001a040
font_01_sfnt_off0000bd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD86 11016 bytes
SHA-256: 332f18c55fba16e785e8ac4f7408c76dbe6c532069afd6db612c3f6cef789f71

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