Malicious PDF — malware analysis report

Static analysis result for SHA-256 a438199612cd3028…

MALICIOUS

PDF

74.4 KB Created: 2021-04-20 11:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 112b18964ea4fde228b7ccd069592e59 SHA-1: 5b418aef276fb2db30d4615564f60f4e9eb599b5 SHA-256: a438199612cd30287c0f67da7b1f3bd1eebba72d18938e5bd59c87820e4b0d82
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search query, likely to trick the user into visiting a malicious site. ClamAV detection and ML classification strongly indicate malicious intent, specifically a phishing or trojan payload. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=how+to+change+transmission+fluid+jeep+jk
    • http://thefortykuti.com/473357085769q1he.pdf
    • https://cdn-cms.f-static.net/uploads/4485711/normal_604b7ebe3af21.pdf
    • http://tublitalia.space/nobivuvevipusosinaw60gq.pdf
    • https://cdn-cms.f-static.net/uploads/4371010/normal_60176504bc816.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pirofopafu/moving_backgrounds_free.pdf
    • https://s3.amazonaws.com/julexekubaj/comune_di_campoformido_anagrafe_canina.pdf
    • https://s3.amazonaws.com/dinisemowoge/html_editor_for_android_apk.pdf
    • https://s3.amazonaws.com/kujesulad/50035873299.pdf
    • https://s3.amazonaws.com/lupebesu/96079149187.pdf
    • https://s3.amazonaws.com/mutirexa/aerobic_and_anaerobic_bacteria.pdf
    • https://s3.amazonaws.com/nonipesikiri/39743379292.pdf
    • https://s3.amazonaws.com/likerajatob/adobe_after_effects_logo_templates_free.pdf
    • https://uploads.strikinglycdn.com/files/f5fc88f7-7751-404e-a66a-72e00e53c6d1/2005_ford_f250_repair_manual.pdf
    • https://uploads.strikinglycdn.com/files/7085bba8-cd8e-465f-aaa2-72a51d30623f/91330362036.pdf
    • https://s3.amazonaws.com/varolexexus/kedudujukonojitego.pdf
    • https://s3.amazonaws.com/jirebonudur/dd_3.5_fighter_wizard_build.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_off0000e4e8.bin
ee69c819a5cd8a9ff5964b0add10862a7ab40eef3107280fb842d6cff895913f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E8 5764 bytes
font_01_sfnt_off0000f870.bin
547bec7a91420be84c444847c62b1c9f6a44deceeb3b8d0ec3a90698c9244cf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF870 10488 bytes

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