Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa1c8987355a2d8…

MALICIOUS

PDF

68.3 KB Created: 2020-12-31 09:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6eaf43988304fe1597ce28060a0ecd4 SHA-1: 9125277ea67c659520b4d000962bbad31f2f0e5d SHA-256: faa1c8987355a2d8898c044129ce2fac7ccedf50ecd787972bd3693aa3734fd5
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL pointing to 'trafffi.ru', which is likely intended to lead the user to a phishing or malware distribution site. No scripts were extracted, but the presence of the malicious URL and the strong heuristic detections indicate a phishing attempt.

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=the+firm+pdf
    • https://cdn.sqhk.co/zubuwebofe/jhiidRd/icloud_photos_apple_tv_screensaver.pdf
    • https://cdn-cms.f-static.net/uploads/4377704/normal_5f92f9f5e994e.pdf
    • https://cdn.sqhk.co/taduzotul/SGtK6f4/christmas_maps_for_minecraft_pe_1._16.pdf
    • https://cdn.sqhk.co/gujadozede/hco3jha/86247953025.pdf
    • https://cdn-cms.f-static.net/uploads/4388157/normal_5f9142b76e803.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/seriposuj/radarscope_android_apk.pdf
    • https://uploads.strikinglycdn.com/files/06f823a7-9eb7-4fdb-bb1f-6c7193cac630/skins_for_minecraft_download.pdf
    • https://uploads.strikinglycdn.com/files/ce3a15f3-52a0-4e8c-b537-d71325b28d46/34429548207.pdf
    • https://uploads.strikinglycdn.com/files/9eb639b1-6b7c-438c-aab7-adb54b3aa171/67586169378.pdf
    • https://uploads.strikinglycdn.com/files/189948e1-c874-47bd-9c9d-d30ca903d69d/fanuwiridojigabu.pdf
    • https://uploads.strikinglycdn.com/files/ef337d38-f696-43cc-8432-ff65335beb1a/stickman_base_jumper_2.pdf
    • https://uploads.strikinglycdn.com/files/25c19e9f-2e3d-4bd3-a9bb-8fd73b21ba4f/51093517064.pdf
    • https://s3.amazonaws.com/lusegokaves/autohotkey_setup_free.pdf
    • https://uploads.strikinglycdn.com/files/f52c043c-69ac-4953-9017-a6f0b9d345f0/2339093460.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_off0000d14c.bin
f1a31b1105d79df8be31a4659a28e75f5bfb682ef05aada75728bf23277119c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD14C 4812 bytes
font_01_sfnt_off0000e17e.bin
d75e5f0b083c9540a8a39b614c6a2e6171cc28113fe02a7c8b49a6220765b4c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE17E 10344 bytes

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