Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2269c760b63c77…

MALICIOUS

PDF

76.7 KB Created: 2020-12-24 22:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 988e823a612330be22ab0f6fb0738637 SHA-1: d5d7ee19f50cdc64e3553a2dec557f2298df5d34 SHA-256: 8e2269c760b63c7758e7ae9e4a3402f8192cd7657a7ce151f49fc9e21f838c23
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF SEO Link Farm' heuristic. One of the primary external links points to 'traffset.ru/strik', suggesting a redirection or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=radio+flyer+walker+wagon+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481061/normal_5fa67d0523bca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377100/normal_5fdec7cb98f04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487191/normal_5fd86058c376a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5fa5db4d3a0d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413457/normal_5fb58d4244e41.pdfIn PDF document text
    • https://mobakuwi.weebly.com/uploads/1/3/4/4/134404075/xivilijarufipimadifo.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/dusej-pobuloj.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://s3.amazonaws.com/jasadavebaga/rinawaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/wirokum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a160362-3116-4066-a040-ab60aab17881/ginajilu.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/89462705873.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/68013019943.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_off0000e336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE336 5108 bytes
SHA-256: 4871b0a47190b8d35f34b17e76e85d335c91653ead9c2f455ce1cfa16ce8f03c
font_01_sfnt_off0000f4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C5 10336 bytes
SHA-256: e955263dd66745d6cbd4001d43a0ce7c75fc223d9ef85ef484f747412e4f7adc
font_02_sfnt_off0001182f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1182F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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