Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9bb2ad7a04489d4…

MALICIOUS

PDF

119.2 KB Created: 2021-03-14 15:16:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad4e7984c576fa8320a2c586d0c43ff8 SHA-1: 4926b981b3fa74bc18d5a020850a7f84b6be0d53 SHA-256: b9bb2ad7a04489d456102c416b97a17442d554d96887e99d333869d6ea76dfec
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs and a heuristic indicating a visual download button, suggesting a lure to trick the user into downloading a payload. The presence of multiple external URLs further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=yamaha+rx+v473+service+manual
    • https://cdn.sqhk.co/vujagefamig/hfjbgiJ/sexemogotozenoruzin.pdf
    • http://joxopenizimili.iblogger.org/wifi_barcode_scanner_for_pc.pdf
    • https://ximabetewu.weebly.com/uploads/1/3/1/3/131384229/3937348f.pdf
    • https://cdn.sqhk.co/mazasofuw/icThhyF/27410702112.pdf
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/40a54.pdf
    • https://gilaxisob.weebly.com/uploads/1/3/1/4/131406303/gajiti.pdf
    • https://fexedewikefitug.weebly.com/uploads/1/3/2/6/132681233/0a0ad982aff.pdf
    • http://doxewoga.iblogger.org/kgf_amma_bgm_songs_tamil.pdf
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/9411102.pdf
    • http://rolivazugatar.scienceontheweb.net/24240965151.pdf
    • http://sadogiropi.mypressonline.com/bestiario_the_witcher_3.pdf
    • https://cdn.sqhk.co/xomatujod/AIRR6if/download_game_racer_underground_mod.pdf
    • https://cdn.sqhk.co/sobekalob/jmijjem/pomasowererukorexof.pdf
    • https://luwujapi.weebly.com/uploads/1/3/4/7/134751522/3146545.pdf
    • http://sakulog.sportsontheweb.net/what_are_marketing_strategy_process.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wigamewekafon.rf.gd/comic_sans_ms_font.pdf
    • http://dagogedimin.rf.gd/29465932774.pdf
    • http://mefowoweman.epizy.com/facebook_photo_notification_2019.pdf
    • http://rowesatuminef.rf.gd/list_of_veg_dinner_items_in_india.pdf
    • http://xaxigodugekesiw.epizy.com/ge_ultrafresh_front_load_washer_with_odorblock_canada.pdf
    • http://tiwatimab.atwebpages.com/how_do_whales_help_fight_climate_change.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017123.bin
8f08e52acc27cd747c91f4a4a51d9ab14c2bd1f184386e8443a48d4954ef7c0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17123 5460 bytes
font_01_sfnt_off000183a2.bin
c76e8e07c59aebb6037abe629c994cb0144a35353eb699300ab3fd3134456f94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x183A2 17244 bytes
font_02_sfnt_off0001b768.bin
c3638f928e2780e6c6cf51f88d3548e344331348ebe51ff090b01793abbfb8c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B768 16184 bytes

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