Malicious PDF — malware analysis report

Static analysis result for SHA-256 0038c565f518fb5d…

MALICIOUS

PDF

67.9 KB Created: 2020-11-26 01:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de703f9d52b4c66701d618a53d7737df SHA-1: e6a0be8d0dbda4d5c867212af4141113b824020a SHA-256: 0038c565f518fb5d4b7581536c1e3730311a70ab5a3d4c946e2b0b437ebdfe61
222 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a vehicle manual, combined with a call-to-action phrase, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?utm_term=2006+vw+jetta+tdi+owners+manual
    • https://cdn-cms.f-static.net/uploads/4387424/normal_5f997a3f06279.pdf
    • https://pivozedotafi.weebly.com/uploads/1/3/1/0/131070355/felizoromubipiworu.pdf
    • https://lubipufubuk.weebly.com/uploads/1/3/4/5/134597980/pisuwivi-vemosa-muxoveloba-wusakotadinewos.pdf
    • https://lunejuwibamir.weebly.com/uploads/1/3/4/5/134587588/rumejadogen-motewoka.pdf
    • https://xazunavawotop.weebly.com/uploads/1/3/4/7/134724639/buradexowikuzu.pdf
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/4041939.pdf
    • https://cdn-cms.f-static.net/uploads/4376358/normal_5f89d0215ac81.pdf
    • https://posanawefu.weebly.com/uploads/1/3/4/7/134711745/8f86c44.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/52d21e34-2a8a-4969-baa7-eea04e2ec1c3/skyrim_se_ineed_hud.pdf
    • https://uploads.strikinglycdn.com/files/29dc4e7e-71af-438e-8d3a-420f7dc59aad/77145283642.pdf
    • https://s3.amazonaws.com/zokokamu/53416325946.pdf
    • https://uploads.strikinglycdn.com/files/27369f1b-8896-4be7-989b-b5d04ce094ff/25598523628.pdf
    • https://uploads.strikinglycdn.com/files/49ffb781-3102-4356-acfe-66240a5abf16/92430026513.pdf
    • https://s3.amazonaws.com/bubodeliza/herring-hall-marvin_safes_for_sale.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca9d.bin
6d2ab6cbbc12c3f6f0ebce1b16c270d01f6609b28b4365936587c1b429736157		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9D 5532 bytes
font_01_sfnt_off0000dd6b.bin
92bc609d62a8b1ad725de2d3451e35f1feb77cce6a65dbd8c4647a731127c5d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 10788 bytes

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