Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e2b861faf36462d…

MALICIOUS

PDF

69.7 KB Created: 2020-12-30 14:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 23c63fd8c48391bc51cc2789100cffc4 SHA-1: 910fc4915ab22d4a0b489e2732dd606354412666 SHA-256: 5e2b861faf36462d300c31f629b6d2626bb94f776c0a2db0401e6f12df33a76a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or link-farming campaign. It contains a large number of embedded external links, with the primary suspicious URL being https://trafffi.ru/strik?utm_term=tropico+5+campaign+mission+list. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffi.ru/strik?utm_term=tropico+5+campaign+mission+list PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462352/normal_5fa3412180378.pdfIn PDF document text
    • https://muwigoxafom.weebly.com/uploads/1/3/4/8/134869335/5811136.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369796/normal_5f9796c261b45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423732/normal_5fb299fbb9fa0.pdfIn PDF document text
    • https://xujebope.weebly.com/uploads/1/3/4/0/134018561/6969081.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/59c89db3-f4a2-4b0b-a0fd-9387f4d4c0f4/daphnia_fun_facts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd3e6c97-0a32-4340-a92a-20c86f5522a9/gipesirezesujifubevobi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114b76fa-0333-417c-8f1e-cb8bea47a2ea/lakigefomas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7381ca-dd40-4d1c-bda9-4b8290c74a28/hidden_valley_ranch_potatoes_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/658f3fec-6f35-444c-89cb-c6c7c2461333/8851806457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afcb3cc1-55fb-4448-9e15-1bedafbf5931/rugubaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de29b97-64b0-4ff2-b5e5-75b5dc76c81d/donelivinonofipapapasuw.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_off0000d594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD594 5324 bytes
SHA-256: fdb855f89f1c940a0e68fed74d83a34c1a6bcc64a17d43d7bf40ee1ee6435330
font_01_sfnt_off0000e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE79D 10168 bytes
SHA-256: 1878b811bce5f5b554edca21088dfbee436f3fd3ada79fc67d60ac2167f694db

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