Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bebf54a90e3f187…

MALICIOUS

PDF

79.9 KB Created: 2021-03-19 18:17:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb64515377e181b98a24944cfa8d2c7a SHA-1: d45bdfb2be7f211ad92f77ff5bf8b327b9fb548f SHA-256: 1bebf54a90e3f1874ef98ce6dfb6e0a78733b7e565f0cba1cc444a03dd4fc227
104 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'zajinet.ru', which is associated with a download lure for 'grand theft auto 5 for android'. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text fragments related to downloading software, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/wix?keyword=download+grand+theft+auto+5+for+android+full+apk+-+appfullapk.co
    • https://static.s123-cdn-static.com/uploads/4488103/normal_6002ecf0eedac.pdf
    • http://sonabalule.iblogger.org/origami_heart_note_square_paper.pdf
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5fc6f1228dcd3.pdf
    • http://jobediniberine.scienceontheweb.net/17565601273.pdf
    • http://tapagigozi.medianewsonline.com/april_2020_current_affairs_free_download.pdf
    • https://static.s123-cdn-static.com/uploads/4425737/normal_6002adfc8deb3.pdf
    • https://cdn.sqhk.co/lizupasepafu/hc7BThd/labasuxaxe.pdf
    • https://cdn.sqhk.co/woragumokewi/5Jghicw/driving_zone_russia_apk_hile_indir.pdf
    • http://dekoriribazovax.mywebcommunity.org/kezalojipamelu.pdf
    • http://degitowexara.iblogger.org/fisoxulosotu.pdf
    • https://cdn-cms.f-static.net/uploads/4453551/normal_60258eb94d484.pdf
    • http://jijufik.22web.org/8206802597.pdf
    • https://cdn.sqhk.co/zimofuzam/idzhibU/freeze_dance_halloween_music.pdf
    • http://pufaxokijajijev.22web.org/98642093274.pdf
    • https://static.s123-cdn-static.com/uploads/4388065/normal_5fc92eeedf41c.pdf
    • http://ruwaxidalemib.iblogger.org/17198209881.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zokitidekav.epizy.com/binotoven.pdf
    • http://xawezovixewija.epizy.com/how_to_use_a_cordless_waterpik.pdf
    • https://s3.amazonaws.com/xuxifuzituwu/career_paths_finance_teacher_s_book.pdf
    • http://tamemesile.rf.gd/sse_engine_fixes_memory_manager.pdf
    • http://kofezinidabefu.epizy.com/how_to_put_plantronics_bluetooth_into_pairing_mode.pdf
    • http://navipulazem.epizy.com/rirotupik.pdf
    • https://s3.amazonaws.com/subopukomanaw/cc._arduino_library.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea5d.bin
098a743558221872d2057239d426298dbba1e8529ef9e424a8557494e5c8e23a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 5584 bytes
font_01_sfnt_off0000fd7f.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 1800 bytes
font_02_sfnt_off0001060c.bin
47a94f1a54939d68f4c7ccaf964e2a9b299f02177af1aca88914767903d9d816		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 15204 bytes

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