Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fed9795782d462b…

MALICIOUS

PDF

69.2 KB Created: 2020-11-14 10:27:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9a00f95d9dd54f491f118f22c2d674e9 SHA-1: 4b63ec7b4946ad426f7af5b553a997794da6383f SHA-256: 2fed9795782d462ba5a23cb0b676c886f6648137ae8ffaaee4f16084cc62cfc2
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with a primary malicious URL being trafffffe.ru. ClamAV and ML classifiers strongly indicate maliciousness, specifically a phishing or trojan payload. The presence of embedded URLs and the structure suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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://trafffe.ru/strik?utm_term=natecal+d+engorda PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5fa8a108ec6b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_5f86f6488b22c.pdfIn PDF document text
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/fd28989654d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5fa372c4577cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450045/normal_5fa003c2c529f.pdfIn PDF document text
    • https://nodokesomizi.weebly.com/uploads/1/3/4/6/134656280/gujijakaz_lubipoxi_xuwojukubiwa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f873fa8356ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475580/normal_5faa33ea0e8f7.pdfIn PDF document text
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/gebafudanuw-lejuleju.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://uploads.strikinglycdn.com/files/6f2a61ac-2b57-46b4-81c5-bcdef07f8482/sevefozuwadepidanukanuwu.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_off0000c7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7ED 4636 bytes
SHA-256: d427c585923e6433a5141610ca8b3008f143c5d4ebe34d0f89247ccb02c6a5cc
font_01_sfnt_off0000d7b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B5 10236 bytes
SHA-256: 09b2e4d6853c4f9be659e9c0379f3e87d914c238226ca2959044392db2e89885
font_02_sfnt_off0000fa9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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