Malicious PDF — malware analysis report

Static analysis result for SHA-256 83a15de6340f7c70…

MALICIOUS

PDF

68.2 KB Created: 2021-02-28 17:56:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81cfcdb1c363ea5eb7aa47c4117f584e SHA-1: cf9100cb03884b50e9eee49ee5448e474c92ffac SHA-256: 83a15de6340f7c707ed4e5d55f837557c94deff287a595caa89c9dbe1cc8cc5a
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. The embedded URL, 'https://seumenha.ru/wix?keyword=con+manos+vacias+vengo+a+ti+jesus+adrian+romero+letra', is likely used to redirect the user to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to exploit user interaction.

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://seumenha.ru/wix?keyword=con+manos+vacias+vengo+a+ti+jesus+adrian+romero+letra
    • https://static.s123-cdn-static.com/uploads/4377388/normal_5fcf6c6000346.pdf
    • https://static.s123-cdn-static.com/uploads/4483070/normal_5fca86a1bcebb.pdf
    • http://argo-tourism.com/445597778355vgoj.pdf
    • http://marinarus.space/latavawekaxibuc16mu.pdf
    • https://cdn-cms.f-static.net/uploads/4393761/normal_602508c33e6c5.pdf
    • http://parhelifrl.space/husqvarna_model_yth20k46_drive_belt3tivx.pdf
    • http://about-central.com/wemo_maker_factory_resetym4nh.pdf
    • http://tameenegypt.com/vehicle_inspection_report_template1nkud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lewuli/vidmate_app_for_android_mobile.pdf
    • https://s3.amazonaws.com/mukut/sixawilepolujelaji.pdf
    • https://s3.amazonaws.com/mikibetiv/73818881136.pdf
    • https://s3.amazonaws.com/ragejufa/arabic_fonts_free_for_photoshop.pdf
    • https://s3.amazonaws.com/bezutu/juvefefusaw.pdf
    • https://s3.amazonaws.com/fajonubinomeder/89467793102.pdf
    • https://s3.amazonaws.com/kofabube/1972_ironhead_service_manual.pdf
    • https://s3.amazonaws.com/tuxenipup/kinus.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_off0000ccdf.bin
f8e28ae550713a288c4dd41bd96cdb148c406874fd716c3e9f7d4dab0f0cd779		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDF 5300 bytes
font_01_sfnt_off0000ded0.bin
413d5def3f93aafaceaf94fff86e2d9afea4c0717b73b50e0957ca0e3d4d9808		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 11200 bytes

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