Malicious PDF — malware analysis report

Static analysis result for SHA-256 36153e0a3689c058…

MALICIOUS

PDF

80.6 KB Created: 2021-03-24 09:04:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9acdbedb2be1f8c38d37855114cda50e SHA-1: 7d48ec6747f004b1b06bc2ffd1336705695d4f5c SHA-256: 36153e0a3689c058d7254971db00bde2d28fef7fed019c1d07dfdbc68dc7579b
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, identified by heuristics and ClamAV as malicious. The ML classifier also strongly flagged this PDF. The document body is heavily obfuscated, but the presence of the external URI suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jumiwimov.ru/award?keyword=fleetwood+mac+never+going+back+again+tab+pdf
    • https://cdn-cms.f-static.net/uploads/4467277/normal_5fd9075aa7b3a.pdf
    • https://gematisi.weebly.com/uploads/1/3/4/5/134599806/monekup.pdf
    • https://cdn.sqhk.co/dalegoti/b6fQnib/man_down_where_you_from_vine.pdf
    • https://cdn.sqhk.co/zarifabidit/iHPfdja/kunaxusemumadedukowi.pdf
    • https://pabarubuvu.weebly.com/uploads/1/3/1/3/131379718/vajot.pdf
    • http://midimox.getenjoyment.net/87464480172.pdf
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/jojutajimego_jozomow_deregijafe_tejojewilizir.pdf
    • https://cdn-cms.f-static.net/uploads/4413240/normal_604e15f527458.pdf
    • https://xidoxuzi.weebly.com/uploads/1/3/4/7/134707988/ff92d454dc.pdf
    • http://rubewox.sportsontheweb.net/can_i_use_my_oven_like_an_air_fryer.pdf
    • http://pedagodogiko.getenjoyment.net/whats_the_best_app_for_free_music_download.pdf
    • https://mavobomuwatu.weebly.com/uploads/1/3/4/5/134592479/fapumidoseki.pdf
    • http://puvinizozibejir.mygamesonline.org/55687137778.pdf
    • http://poxumanavofeboz.scienceontheweb.net/air_crash_investigation_reports.pdf
    • http://lejidakoxinetog.mywebcommunity.org/bofapozepuxikim.pdf
    • https://static.s123-cdn-static.com/uploads/4407729/normal_5fcdb4833b6e8.pdf
    • https://cdn-cms.f-static.net/uploads/4465136/normal_6012cebc988eb.pdf
    • http://rarubife.mygamesonline.org/sat_test_10.pdf
    • https://static.s123-cdn-static.com/uploads/4482018/normal_600220cf7d997.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ganubifirigevi/xipadalokifupujuna.pdf
    • https://s3.amazonaws.com/libowebujakux/what_is_a_free_motion_sewing_machine.pdf
    • https://s3.amazonaws.com/xafaxotaful/gokomel.pdf
    • http://fumibilulad.atwebpages.com/zirujogajo.pdf
    • http://wupidusujimi.myartsonline.com/64322158561.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_off0000fc95.bin
e6ae908e61ff62111360213002de0e99a95bd0d1540f03d4dabf2be81ba2eb31
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC95 5608 bytes
font_01_sfnt_off00010faf.bin
3e7b747a9614cd109eddaf092595e56951ef8c333dfd9015826442d455fb6a50
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAF 10784 bytes