Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3d0fe1fbeb0d74…

MALICIOUS

PDF

93.9 KB Created: 2021-01-06 11:18:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 560b341260d40f2dab3c5ad3dda1ca2d SHA-1: b4ef72403d91eb31b32c0518ae421568bf928a64 SHA-256: 6c3d0fe1fbeb0d74b9dfe4a8de728675911c73ae2046a976f9c92b55daf1fca9
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains text that appears to be a lure related to social media applications.

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://trafffi.ru/123?utm_term=boyfriend+applications+for+facebook
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f907c3ff2305.pdf
    • https://cdn-cms.f-static.net/uploads/4491723/normal_5fb85dc04a364.pdf
    • https://cdn-cms.f-static.net/uploads/4392470/normal_5f90ed91450b1.pdf
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5f93b1b252d40.pdf
    • https://static.s123-cdn-static.com/uploads/4478387/normal_5fee1d5abf722.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gaxuremewuger/google_plus_groups.pdf
    • https://uploads.strikinglycdn.com/files/5bb91410-91f0-49f9-9f39-753e9cc64597/talk_show_pitch_template.pdf
    • https://s3.amazonaws.com/pobixedele/sujinesififinanidi.pdf
    • https://s3.amazonaws.com/moduxanakuri/77277278455.pdf
    • https://uploads.strikinglycdn.com/files/939081b7-eede-4007-984c-a0c8e4a5271f/fb_messenger_apk_app_download.pdf
    • https://s3.amazonaws.com/xanebavifamopez/xudiras.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/online_converter_bitmap_to.pdf
    • https://uploads.strikinglycdn.com/files/9884a5fa-3f54-4a4f-b3da-2b30e1c3d812/49105825396.pdf
    • https://s3.amazonaws.com/bubeto/56319562946.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000129f1.bin
b4742f540c6e4270e6dc14bb72bd65a8721281b3ebbf6eb24228988201e2b63f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129F1 5504 bytes
font_01_sfnt_off00013cb9.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CB9 1800 bytes
font_02_sfnt_off00014546.bin
0cdadcb7ac8489baea17bc0aa313e06a07c62ebc641b4440f48f2a383f44d257		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14546 10856 bytes

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