Malicious PDF — malware analysis report

Static analysis result for SHA-256 72272040d62f27d2…

MALICIOUS

PDF

80.5 KB Created: 2021-03-18 21:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a700ed46e326202414af9398f2ab3806 SHA-1: e5fa4f1597a6ebe49fa099f40907bf4b912c9a04 SHA-256: 72272040d62f27d222d57e72fb1a03df4d83bc25a0dc4e84243e5d7a962891ff
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 URI pointing to 'resalured.ru', which is likely the malicious destination. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/award?keyword=laboratory+report+writing+format+pdf
    • https://cdn.sqhk.co/tixunudixa/hbVggDl/n64_emulator_apk_uptodown.pdf
    • https://cdn.sqhk.co/golemejexeno/giCjihb/gefapawabaduxam.pdf
    • http://mnatural.space/collection_manager_roles_and_responsibilitiessc8b8.pdf
    • http://adanakebap.org/xabemimuzlxai4.pdf
    • https://cdn.sqhk.co/tebefaravuz/hri0Phe/72364294123.pdf
    • https://cdn.sqhk.co/tevotapomow/iiejajb/pelufiwov.pdf
    • http://pe50off.pro/pafokuvutotigitogm9gz.pdf
    • http://lnstagramverifiedsbadgeform.com/86133395853na3fa.pdf
    • https://static.s123-cdn-static.com/uploads/4480595/normal_6001cd628d8c4.pdf
    • http://classkaod.ru/uniformly_accelerated_motion_model_worksheet_3r1f14.pdf
    • https://cdn.sqhk.co/zitiwofiru/aKjanXY/r_package_dplyr_cheat_sheet.pdf
    • https://cdn.sqhk.co/dudugetogi/jaOjjLR/fedugap.pdf
    • https://static.s123-cdn-static.com/uploads/4470977/normal_5ff3815496da8.pdf
    • https://cdn.sqhk.co/mifigatira/OhepDha/69054824880.pdf
    • https://cdn.sqhk.co/vubiwete/hzjfuhd/jirunuxo.pdf
    • http://streichpack.online/473791958624ad3z.pdf
    • https://cdn.sqhk.co/gunobawiwax/hkhaGdI/cast_of_star_wars_1-_3.pdf
    • http://prostotit.site/26219873253apqal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fosalizuzu/american_harvest_snackmaster_dehydrator_model_fd50_30.pdf
    • https://s3.amazonaws.com/rawesaragegugar/chrome_ing_proxy_script_delay.pdf
    • https://s3.amazonaws.com/setigafat/10157886852.pdf
    • https://s3.amazonaws.com/likadojivivofu/wofepogotuwabu.pdf
    • https://s3.amazonaws.com/loxopudizus/how_to_vacuum_seal_foodsaver_containers.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_off0000fbe7.bin
d5bd1deb5d6ca38b3117bd2223733f0f21d6498f77ec3163d0c4f66abadce43b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 5428 bytes
font_01_sfnt_off00010e61.bin
82a040d6a0b5e58ee36883b75427fb438d6991c72cd61200ba03cdc85e57af58
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E61 11304 bytes