Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db4711e3a0a7b9c…

MALICIOUS

PDF

68.2 KB Created: 2020-11-25 06:46:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8c6a77c0a3e3dd5e008b8f609f58c22c SHA-1: 07a69fc9cbf377393feee796fb2f76847edc58d8 SHA-256: 9db4711e3a0a7b9cd727cb040efc3bf5c8b65e9aba76dd8fa7c34d6db64f83b8
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a 'PDF_SEO_LINK_FARM', directing to suspicious URLs like 'https://trafftec.ru/strik?utm_term=sarabi+lion+king+2019'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious content.

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://trafftec.ru/strik?utm_term=sarabi+lion+king+2019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412161/normal_5f938687d5202.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413456/normal_5faef06642580.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389805/normal_5fb79fc57ed75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414169/normal_5fb6b0731cbf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5fa7d02fea443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_5fafb285f3005.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446649/normal_5fa14d19dd63a.pdfIn PDF document text
    • https://nebemono.weebly.com/uploads/1/3/4/3/134331812/selifefep-fokobaxuxonaze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5f98fea388187.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/xeroguru/metra_70-1761_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/woretox.pdfIn PDF document text
    • https://s3.amazonaws.com/gavobawum/10284427817.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/19351534696.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/79915317858.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_off0000ccf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF0 5464 bytes
SHA-256: 2153c9616093c6937d447c5434eeb6b6aa5b436b7d5278107aaa4f74ca85c73a
font_01_sfnt_off0000df96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF96 10808 bytes
SHA-256: 4b56cdd1c6e4dde979714867412b3fee805be58f7e10d0b6bdaa0481f387fcd4

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