Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e15d043f32af259…

MALICIOUS

PDF

67.9 KB Created: 2020-11-25 11:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 3c6fabcdcfe1180bba6cdab5d0bc92f4 SHA-1: e83c3e49cab027317755d87bf05a0bb403af850a SHA-256: 8e15d043f32af2593fcd1dae150af26e0a61530cde5fe74ea05681bef792750b
214 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector URL, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'muscle car games download', aligning with the lure observed in the heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/strik?utm_term=muscle+car+games+download In PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_5fb4454115027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382976/normal_5fa3e2a25c315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376598/normal_5f9ebf9f571cf.pdfIn PDF document text
    • https://liloxowilobo.weebly.com/uploads/1/3/4/2/134265539/949b1f3986ee.pdfIn PDF document text
    • https://xitofubipu.weebly.com/uploads/1/3/4/3/134375163/6789928.pdfIn PDF document text
    • https://xaxexapiro.weebly.com/uploads/1/3/1/4/131453807/923647e8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409801/normal_5fbd3795971a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377674/normal_5fa33b07d5c1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385613/normal_5fa2c398a315e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387061/normal_5fa86c93e68de.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/defipedibe/13269626923.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/xajexezexirigoretaxale.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_off0000ce4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4D 5356 bytes
SHA-256: b2a5ce965261213838a754c5c72c323e838512bacea5e3be6e50f7667cde2f03
font_01_sfnt_off0000e087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE087 10248 bytes
SHA-256: c1ffdbd4a23eef8daf2663b42139887365e3b99660bcbc29cc5231e3c77f16f1

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