Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f446ce71c24741…

MALICIOUS

PDF

67.1 KB Created: 2020-11-23 11:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e9cd0ce9992f7802e29498f9581d92c7 SHA-1: d2b7b307e0d4cdd82d3163531f1d7488039cbde7 SHA-256: 16f446ce71c2474116eb6bf9c2a4d45280e75041390abc6600b5735d9c238ca9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for a free game download. This URL, 'https://trafftec.ru/strik?utm_term=need+for+speed+rivals+free+download+on+pc', is likely intended to trick the user into downloading malware. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=need+for+speed+rivals+free+download+on+pc PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411931/normal_5f979ac13055e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f9326b15c5d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5fb53711f0769.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413590/normal_5fbb58079d2c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368970/normal_5f951a168974a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5fa8f2507363f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414169/normal_5fbab2bebc508.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_5fb6ac39836a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497131/normal_5fbb410889af4.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/henghuili-files2/84955092763.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faf909d2-3104-4b73-a8c5-aaac9be44202/church_musician_salary_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261dee5b-0559-486a-b020-6aec5e1f68ce/6596340333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f60da1a-a910-4603-a3bb-fb24d00f2476/rasitoguwujufutijame.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_off0000ca8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA8E 5272 bytes
SHA-256: 3e86416b3b463b81fb9f8539229fa5cbecefaa85a7285b10020f35a399571cd4
font_01_sfnt_off0000dca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA8 10564 bytes
SHA-256: 177faf3b9d6deb7286a3be7aa57f7304b05cfd2e2d6c0f8d454e093143303755