Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98a89bf1f6db430…

MALICIOUS

PDF

60.0 KB Created: 2020-12-25 19:34:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 6406c37345839fe831f6ed06536ede76 SHA-1: dea6878200b2c161f3e71a209f8a9e3e6ae19713 SHA-256: b98a89bf1f6db4300875ac0f8053a5d95a7aa516c7f0b4ebf29664cd47874daf
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://traffmen.ru/strik?utm_term=rave+videos+with+friends+review'. ML classification and ClamAV also flagged this file as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'Rave videos with friends review', suggesting a phishing or social engineering attempt to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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=rave+videos+with+friends+review In PDF document text
    • https://static.s123-cdn-static.com/uploads/4475383/normal_5fc55b58b76de.pdfIn PDF document text
    • https://cdn.sqhk.co/goremujoz/QxgfJhe/antifouling_convention.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_5f91ee66299e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5fcea29cb8b80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404105/normal_5fc5af403af0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402953/normal_5fe2eb0643b62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388158/normal_5fdae83a9f00b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459929/normal_5fc99e1a8addd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420019/normal_5fc4883a57190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411512/normal_5fa97f7fa63a8.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/dinigugaxej/motu_aur_patlu_movie_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e824394f-fa27-4e26-a963-0e0fc8493f69/16847764393.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0526c17-e65a-469a-9fd4-692a494219c4/memori_cinta_suraya_full_episode_71.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1e02652-f59b-4fcc-975b-b3fc9787bf88/zipefaguni.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_off0000b19f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB19F 5124 bytes
SHA-256: 4d961e3ff18b8478711d71623cccc7e343bd18e03dce9a8e5acef410165c7193
font_01_sfnt_off0000c323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC323 9456 bytes
SHA-256: 10f4e4f70a283628b344c0ff84d85ff83625fed7cf8797f4d5b564fa6680ec16

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