Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cc109971c7078e1…

MALICIOUS

PDF

76.1 KB Created: 2020-11-21 12:19:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 413c5fe5ac9cfae55bc63df60725e825 SHA-1: c107814e9d114e6346782475274b15090175e8c5 SHA-256: 1cc109971c7078e104d5d6e7ecbbd96db15b2fc4a3a9cfb6aca7f20e700f8ed5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier also indicate malicious intent. The embedded URL 'https://trafffi.ru/123?utm_term=focus+3+album' is a primary indicator of the malicious destination.

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/123?utm_term=focus+3+album PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4448549/normal_5fa1f283cd5c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f8e3211ac232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369331/normal_5f926b8d01cb1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5f8e34236cad6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489844/normal_5faa56b77d724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378157/normal_5f974f3f0ba7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368732/normal_5f87b8606976c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_5fa0e62f7b4c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5fa053df47dfe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420905/normal_5fada19009318.pdfIn PDF document text
    • https://rodamopuxex.weebly.com/uploads/1/3/4/3/134354351/lobelajak.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/resixexi/39827719603.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/bayonetta_2_cosplay_costume.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/5342497608.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_off0000e12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12D 4640 bytes
SHA-256: 0f0ecd90bc149817c17246a7e65fd6e52b8696501d3f0bef9c7260081462fa31
font_01_sfnt_off0000f0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E9 10792 bytes
SHA-256: af5bd5752b6e41e71559f1a5f7b8ada438b19fe3548166bd1b50f2e88c89c1b8
font_02_sfnt_off000115ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CA 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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