Malicious PDF — malware analysis report

Static analysis result for SHA-256 e097c877d6f3b9be…

MALICIOUS

PDF

76.4 KB Created: 2020-11-19 23:34:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 86b13d9fe946669b8a45fe2154a4efaa SHA-1: d6e79d7f34777ae6cf29e6d6bdf7192e3a2ced03 SHA-256: e097c877d6f3b9beb697b7c32f6591b4ae155acb00d63781d7de72f51ebb3684
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document contains numerous external links, including one to 'trafffe.ru', suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF structure indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

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://trafffe.ru/aws?utm_term=caid+des+cit%25C3%25A9s+reportage+special+investigation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481162/normal_5fb2b50cd085a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374360/normal_5f98ae2652301.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f9fe2285d9fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450041/normal_5fab8389b4371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367005/normal_5fb3c8969de7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393511/normal_5fa1e89844630.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f8c1f5bde7d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410695/normal_5fabbc424e8bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481665/normal_5fa8c8a9a7078.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/40e41c0e0b91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f8fe3acaee1a.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/sebunuzu/bursting_strength_tester_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9be229ec-9f46-48f5-8853-cb21215ca86f/sonafotegasotupubaroragul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c994bdaa-eca4-4a5a-9bab-8da80d43d940/56757119455.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ceee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEEE 5348 bytes
SHA-256: 997e90fbb417fb3dcae761e6fae8b75e78e4ede1ad80dae361c06c328dbebad2
font_01_sfnt_off0000e0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EC 12980 bytes
SHA-256: d32f9ddfd0d0d24ab47867aa7b733561c46e4c1515fd142ebc56f5c4b8f00930
font_02_sfnt_off000108c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C2 17196 bytes
SHA-256: d43a5dc4680a60697a21598678e32611ad95cccac81feee3bfca749d06ba183c

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