Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad307816c3fe18e5…

MALICIOUS

PDF

63.3 KB Created: 2020-12-23 20:04:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd15b7131a26cd4f181a85afd8e1adea SHA-1: b5f9e6fea6cb356f6067cb42c8e92ae54cf46b33 SHA-256: ad307816c3fe18e5425342a63e3eaa43ab596cc945fe8def20bd935e89fe872a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL points to a site offering a 'redline rush police chase racing mod apk download', suggesting a lure for users seeking game modifications, which could be malicious. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious download.

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://trafficel.ru/strik?utm_term=redline+rush+police+chase+racing+mod+apk+download
    • https://static.s123-cdn-static.com/uploads/4372360/normal_5fdfa2cd6958e.pdf
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5f8debf3647f2.pdf
    • https://cdn.sqhk.co/supuzeren/hdjfjib/83529145199.pdf
    • https://cdn-cms.f-static.net/uploads/4459641/normal_5fb9217972749.pdf
    • https://cdn-cms.f-static.net/uploads/4379219/normal_5f99eed14e044.pdf
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5f9aa455c9b71.pdf
    • https://cdn-cms.f-static.net/uploads/4410194/normal_5fa1ee96ab182.pdf
    • https://cdn-cms.f-static.net/uploads/4421959/normal_5fbabb10b2d09.pdf
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5f88a5da05783.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b7a1db67-0dd1-4ff2-99f1-a62a0c48eaa0/priscilla_shirer_gideon_viewer_guide_answers.pdf
    • https://uploads.strikinglycdn.com/files/fae54d40-4f0f-405c-be2b-638a28183838/394382620.pdf
    • https://uploads.strikinglycdn.com/files/85faf0c2-fc7c-4052-a142-361dcb86b6d7/71448630439.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_off0000b729.bin
7c08227e9c01e25403792162ccd8b9f8b8ca47ad62991d70c31dfce6f4e827a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB729 5652 bytes
font_01_sfnt_off0000ca50.bin
5e61bcdd5eb6674c255d7cc36e9d5068f5e4a321f58687e055298dcd8a0f5487		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA50 11400 bytes

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