Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f9b826863e3df9…

MALICIOUS

PDF

69.1 KB Created: 2020-11-24 05:59:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 506332811cc2bcadce12a5a71b0a295d SHA-1: 588ff76b83b18066eb4bd5b46fbd56dd7e816bc5 SHA-256: 11f9b826863e3df94438831aab16d80a4d8b3a58b6c60626874452abf7ba7bf8
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded links, identified as a link farm, with a critical heuristic firing for malicious redirector infrastructure. The primary malicious URL is 'https://traffmen.ru/strik?utm_term=town+of+salem+hex+master'. This suggests the document's purpose is to redirect users to potentially harmful websites, likely for phishing or to serve further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=town+of+salem+hex+master In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f9485cf33e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422627/normal_5fb32fffde219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421471/normal_5f96b5fc61d40.pdfIn PDF document text
    • https://xamegazu.weebly.com/uploads/1/3/4/4/134440804/zapot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416316/normal_5f9a8c0b5b884.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f98a24928d78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5fa682b83b937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375352/normal_5f8a146f7d756.pdfIn PDF document text
    • https://tozijaletaxe.weebly.com/uploads/1/3/4/3/134312516/1970676.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378378/normal_5f92f9402b307.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/fodose/framed_ink_marcos_mateu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868218dc-4df6-4d98-b920-c1a62c63f439/bujiji.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/view_navy_orders_online.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c65a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC65A 2984 bytes
SHA-256: 218615c96ca80467247facc766f9c2f2584948c92711c8aede41886f3cdaaaab
font_01_sfnt_off0000d109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD109 5116 bytes
SHA-256: 065f16bfebf228a3d8dd0de228a8a5c3556a9b86e5a01179416349edd2595c4a
font_02_sfnt_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 10928 bytes
SHA-256: 9223fda2d0b88ca44bf482467327d8d9e8ef6f1620f342f337ab8e7361b24459

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