Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9cbaec001e380c4…

MALICIOUS

PDF

91.7 KB Created: 2020-11-17 00:05:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57ed0e6d5d2d753bfff6357a2d67ccce SHA-1: 174f1adccb7f809c410f2cb50e1ea05f1aa49638 SHA-256: a9cbaec001e380c4ed7f640d922f7030f16c298a83e1605cd616b885a89315f8
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, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://traffine.ru/123?utm_term=mefferts+x+cube', which is likely part of a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=mefferts+x+cube
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5f8aed9a1fa2a.pdf
    • https://cdn-cms.f-static.net/uploads/4417405/normal_5fad5c64afe3f.pdf
    • https://cdn-cms.f-static.net/uploads/4378386/normal_5fa0673291798.pdf
    • https://cdn-cms.f-static.net/uploads/4374978/normal_5f8df7886e9d9.pdf
    • https://cdn-cms.f-static.net/uploads/4370080/normal_5f88665a8d880.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b02c6040-cd6e-463c-8c0a-f7d5f3de8549/inovix_ipocket_manual.pdf
    • https://s3.amazonaws.com/nisiwanolom/muduvananadew.pdf
    • https://uploads.strikinglycdn.com/files/1021f39e-b46f-40f8-afe3-3cddbf408d5b/la_frise_chronologique_ce2_exercices.pdf
    • https://s3.amazonaws.com/wizedumi/junamofogizuniwof.pdf
    • https://uploads.strikinglycdn.com/files/7baa3244-7a70-4e7b-8454-57fd041069d6/24065540339.pdf
    • https://s3.amazonaws.com/zetare/13532444985.pdf
    • https://s3.amazonaws.com/wexoteluwag/sepideditosapovuzu.pdf
    • https://uploads.strikinglycdn.com/files/856c1146-d12a-4573-9424-64f84a7212a4/nitewopupupowogumiwaxorus.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_off00012cde.bin
6c7c6e6244f968642ced2fa32fbb702dae86b52822447da08916ccff1b4972a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDE 4848 bytes
font_01_sfnt_off00013d86.bin
74c0adaa8ae034a9b60c41b8d11b1bc544d819330e31caf9a608332e22a4ef22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D86 10816 bytes

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