Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a7702fcfa8640b…

MALICIOUS

PDF

72.8 KB Created: 2020-12-25 07:05:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 04c0c9779536abc894c38f36f8d6bb11 SHA-1: 00f48eb901c37ed1e4a287dbc76de69f69d93239 SHA-256: 29a7702fcfa8640b13271b41211e87c7234cbfa5db5ddd8ece05913cb5180227
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing lure. The primary URL, https://traffset.ru/strik?utm_term=champion+horse+racing, is likely used to redirect users to a malicious site. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malware distribution attempt.

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://traffset.ru/strik?utm_term=champion+horse+racing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378155/normal_5f9bcd27a62b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467322/normal_5fc3acfb48c56.pdfIn PDF document text
    • https://kazigujexumakul.weebly.com/uploads/1/3/4/3/134320364/vebusa.pdfIn PDF document text
    • https://buvowanux.weebly.com/uploads/1/3/4/6/134685119/natawikux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404723/normal_5f98531019c87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f884f63303f0.pdfIn PDF document text
    • https://cdn.sqhk.co/letowajaf/hbtGCie/wufafajagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422897/normal_5fdc46e297792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446017/normal_5fc3d3d32bcb3.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/4863f6ea-9f0b-46a4-b130-c4c692c2218f/food_chains_and_food_web_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f55ac873-4a89-41f0-a6a3-de11309d52b2/sarerularajitikukukax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193afa8f-5859-445b-a240-92c5ba21778c/otis_michigan_offender_search_female.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_off0000e030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE030 5220 bytes
SHA-256: b7f3f08b5197252e75539c2955148077995eb3ff2bf37f8b6ffd33b1578d37ff
font_01_sfnt_off0000f1c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 10892 bytes
SHA-256: d838baeef68d65f174e8c72a414333d814338cdaacdd7f710d26916ba2754039

Open this report in the interactive analyzer, or submit your own file for analysis.