Malicious PDF — malware analysis report

Static analysis result for SHA-256 66793b6c5ea05e98…

MALICIOUS

PDF

87.2 KB Created: 2020-12-29 14:32:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b57867111d41f75e707968d4b677e424 SHA-1: 77a9f94dba54ea59441e3c134c1f878c6d860c94 SHA-256: 66793b6c5ea05e98ad2af53c558b5c859a00e72501c2c2ab250ce1d547db75c2
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic and the 'ML_NYX_PDF_MALICIOUS' flag. The primary malicious URL identified is 'https://traffmen.ru/strik?utm_term=mortal+kombat+xl+fatalities+list+xbox+one'. This suggests the document is intended to lure users to a compromised site, likely for phishing or further malware delivery.

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
  • 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=mortal+kombat+xl+fatalities+list+xbox+one In PDF document text
    • https://cdn.sqhk.co/midipumep/jhHyjbJ/short_video_app_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425235/normal_5fe19185c5dbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402294/normal_5fe2bcef2038d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d3e7a3-4ea2-4a52-a491-8c28a82260a2/bekirelap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3574ce33-b2cb-46ee-8d33-209b41de6ae3/paypal_account_generator_no_verification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c39a798-c826-4052-93b3-7a8e940dca2d/andy_romero_pack_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a534eff6-2950-4aaa-9089-d47d4e6144d3/carcassonne_apk_mirror.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf92480d-49f1-4f30-977f-1543b6775b3d/plus_size_sweatsuit_tie_dye.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9159b05-e27c-41bf-918d-f49631c45b3b/48744010621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f1aacad-f76a-4d22-b85b-3ad2682c784c/33070555554.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/design_home_apk_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f71afb0d-1c59-4505-b380-d1840f2368d0/83572876134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f2d558-2616-4100-b561-759fcad230ff/nigatatu.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_off00011a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2E 5188 bytes
SHA-256: a0eb80134bef9be06b9c75756c03ff5b646b43c7df28a31e9725cb3a48ae258f
font_01_sfnt_off00012bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD0 10528 bytes
SHA-256: 8d34f7f4dd5ac40315e428b1fa6636c2cf7210c2bf80eb9ba292f0c68b69624b

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