Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f82c1cd37400f38…

MALICIOUS

PDF

74.7 KB Created: 2020-11-25 14:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7a6c7607eee56d1dd7e45531309b21e7 SHA-1: cca0e3a89aec4cb31b2c144f20180d9236e3ddf3 SHA-256: 2f82c1cd37400f38a9730be3b46d7b13b5580a36793f5e4b18f3c916870c874f
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, directing users to potentially malicious websites. One critical heuristic indicates a link to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to a 'game guide'. The presence of multiple benign-looking PDFs in the link farm is a common tactic to obscure malicious intent.

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
  • 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=case+clicker+game+guide In PDF document text
    • https://gidexexururetus.weebly.com/uploads/1/3/4/5/134505918/418ab3970fd51.pdfIn PDF document text
    • https://jusujonolixutuw.weebly.com/uploads/1/3/1/3/131379247/sotubatuje-lesade-jowanilovivarag-tubepavarodoror.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/1696278.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/wovigebi/knowepark_primary_school_inspection_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c46246-1ab5-4555-a63a-05e4afc213d8/74438125816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd2e636-d54e-41bd-9276-71c53b0edd66/tomowaxozarezavimivifed.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/49606278998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/286d6af2-3af8-400d-a962-3d72007b8965/six_not-_so-_easy_pieces.pdfIn PDF document text
    • https://s3.amazonaws.com/nemafu/deep_breathing_exercises_for_stress.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/061028b1-1c9b-47a2-91e0-98c5a655b07e/10038513875.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e894.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE894 5228 bytes
SHA-256: a4137aba7920219294839fe78deb03035a672c7f38995b106cb33280ff159074
font_01_sfnt_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 10664 bytes
SHA-256: 9bec270c1fbdff894ff25521f37fbc14ba5238776afc47066e697f6a6beedc42

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