Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b9e0c687b1ca6f…

MALICIOUS

PDF

58.3 KB Created: 2020-11-24 03:22:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: fd88861998a04d036464d6317ae8ddff SHA-1: 8411482e20b524bcb3d9c7bed90bedf3df271e31 SHA-256: 54b9e0c687b1ca6f51f01c8e98df2a549e4a2d38909b6a48e80ad11f33cd52ad
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a site associated with torrent downloads, suggesting a phishing or malware distribution lure. No scripts were extracted, but the presence of the malicious URL and the ML/ClamAV detections strongly indicate a phishing attempt.

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://traffset.ru/123?utm_term=torrents+audio+latino PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384831/normal_5fb44389a261a.pdfIn PDF document text
    • https://zekasujiminog.weebly.com/uploads/1/3/4/3/134366003/voted-dapegodake-zetefetiwozofet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482623/normal_5fafaa693734b.pdfIn PDF document text
    • https://natulawud.weebly.com/uploads/1/3/4/3/134309077/8a526f13c92d4.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/8d88805f-3f8c-424b-a77c-6fff236e38a8/21583070116.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/justification_letter_for_training_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0821119-731f-4f52-adef-58d2bd5f8e63/rutuxotaguguwuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf94836f-b284-4da9-a490-2fda4606ddeb/dudopuxukobufevu.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/arrow_of_light_requirements_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/mewezekilafef/kmspico_windows_10_activator_password.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/24879583562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49dd260e-4012-4d55-83a5-6d36dab6433c/poe_innocence_fight.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/josh_admin_template_laravel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89592237-bcd8-489c-9d53-0f9189d64f3a/76669852402.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/tuvedapepikomidumafelo.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_off0000ae52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE52 4768 bytes
SHA-256: bdc3b108f7a9759c955399a67f9fe7f531d936d64e9f8d0cab309c997f35ea3a
font_01_sfnt_off0000be8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE8E 8796 bytes
SHA-256: d2bc9790a903dc0612079220991387ecdfc71d85d29ed4b21aedfee94de2a890

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