Malicious PDF — malware analysis report

Static analysis result for SHA-256 b298cbaa8c91c727…

MALICIOUS

PDF

76.3 KB Created: 2020-12-29 13:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f466e6ed604d9477069b11e2218a0e2 SHA-1: 5c092a892bf73511b87a5735118c950bcae0e092 SHA-256: b298cbaa8c91c727bf1bace4e54e712025d7c456342ca30a49fba5404fcb95f0
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 pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

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://trafffe.ru/strik?utm_term=elite+homes+mobile+al
    • https://cdn.sqhk.co/xulawajikigi/fr4behe/22090804548.pdf
    • https://cdn-cms.f-static.net/uploads/4465919/normal_5fa7d2dbb2341.pdf
    • https://cdn-cms.f-static.net/uploads/4402488/normal_5fa3c3ef18991.pdf
    • https://cdn.sqhk.co/jevipugirofi/RLHW0qQ/best_air_traffic_control_game_ipad.pdf
    • https://static.s123-cdn-static.com/uploads/4426421/normal_5fd0648ff10a7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/nezanurugega/supply_chain_management_franais.pdf
    • https://s3.amazonaws.com/jumedemimo/69061292545.pdf
    • https://s3.amazonaws.com/turip/77309827554.pdf
    • https://s3.amazonaws.com/jifesu/andy_android_emulator_reviews.pdf
    • https://s3.amazonaws.com/tifuwuw/negijipiruwadunufanulot.pdf
    • https://s3.amazonaws.com/viboxikuz/ffxiv_blue_mage_leveling_guide.pdf
    • https://s3.amazonaws.com/wexoteluwag/android_mobile_battery_saver_app_free.pdf
    • https://s3.amazonaws.com/jevelel/34594839597.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_off0000ef96.bin
bd1104ee3ca6301f5813151d4958d916e48e04a94dd16fed05b446dad85e9000		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF96 4928 bytes
font_01_sfnt_off00010032.bin
b3d05159e8f067ea962ca26bf0b13165b4a6bde0e3f12a007a63d3a4cdd08fd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10032 10820 bytes

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