Malicious PDF — malware analysis report

Static analysis result for SHA-256 d740299f71c85d18…

MALICIOUS

PDF

84.8 KB Created: 2020-11-27 04:55:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 576ce054cd051570e6d726ee7fe82ade SHA-1: 8f8b7fc33039fd50ac96456a53c6441703f64eae SHA-256: d740299f71c85d18058f112436e4349254aeb8ec1cec0c07c734582e30db067b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics indicate a malicious document likely intended to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=rpg+offline+apk+obb
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/a4a0c844c22901.pdf
    • https://cdn-cms.f-static.net/uploads/4472186/normal_5fafffb39b9fa.pdf
    • https://vajemedodumuni.weebly.com/uploads/1/3/4/3/134351385/zefasojozin.pdf
    • https://gofikebome.weebly.com/uploads/1/3/4/8/134847018/gavakelud.pdf
    • https://pewovorawegoxuv.weebly.com/uploads/1/3/4/3/134351704/6c61bc5bd9fbe5.pdf
    • https://cdn-cms.f-static.net/uploads/4417999/normal_5fa3adbe5cb56.pdf
    • https://cdn-cms.f-static.net/uploads/4408187/normal_5fa4300370ad7.pdf
    • https://cdn-cms.f-static.net/uploads/4366327/normal_5f90fbf7abeb2.pdf
    • https://cdn-cms.f-static.net/uploads/4384647/normal_5f8c5fc868ef6.pdf
    • https://cdn-cms.f-static.net/uploads/4365621/normal_5f943d6e39299.pdf
    • https://gozanesudobewer.weebly.com/uploads/1/3/4/8/134852120/7323143.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kelageketisefuv/clownfish_voice_changer_new_voices.pdf
    • https://s3.amazonaws.com/sivanira/natamamizisunirik.pdf
    • https://s3.amazonaws.com/redegelesibif/dnca_invest_miuri_fact_sheet.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_off00011110.bin
6cf9439a709e47a2ead6a653123ce549f67ddf1b9b5dd43a310c2b106e95a829
pdf-font-stream PDF embedded font (sfnt) at offset 0x11110 5004 bytes
font_01_sfnt_off0001223a.bin
402a39cabc79a1ba90ab7f478e1e3e4630b16afc53190703d44fee50020fc5d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x1223A 10588 bytes