Malicious PDF — malware analysis report

Static analysis result for SHA-256 846a5ed44e8e5cf0…

MALICIOUS

PDF

68.2 KB Created: 2020-11-27 10:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: dd267d0617e1040e030054bdb5443062 SHA-1: 8aa78da5ab354202ea4ae886f0a6a63d8a978f54 SHA-256: 846a5ed44e8e5cf0301b3109ca2bfefd9bb71fa492950fca087fac7a62444f99
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, and is flagged by ClamAV as Pdf.Phishing.Trojan. The primary URL, trafficel.ru, is likely part of a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://trafficel.ru/aws?utm_term=business+communication+strategy+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448331/normal_5fc02efa9cde9.pdfIn PDF document text
    • https://suxokigivulumu.weebly.com/uploads/1/3/4/4/134479742/8996222.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492272/normal_5fad59785b291.pdfIn PDF document text
    • https://rotowuvusokij.weebly.com/uploads/1/3/4/8/134884207/malitilezuxokigi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f8b1f64a22a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368956/normal_5f8c66f3e352a.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/dogazisuze/goroxoleluvumenelokagud.pdfIn PDF document text
    • https://s3.amazonaws.com/dewutexorob/best_meme_creator_android_app.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/cemetery_of_splendor.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_off0000d0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F7 5404 bytes
SHA-256: 6aa75fff8a3f14e7e1ac3612d307e83c8daa2d865475fca42d7d7cec8477e3c3
font_01_sfnt_off0000e34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 9780 bytes
SHA-256: e70c108bed6c2b1956e0a63b46afdec1786da09c945ee62deab01a85a73a2484