Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f1c1a32492e6ba5…

MALICIOUS

PDF

77.1 KB Created: 2021-03-24 21:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b6040454ff395cff741975c357ba039 SHA-1: bb4059304f89b21e53cf7cc347fb15b905854a0f SHA-256: 9f1c1a32492e6ba59ed0737be17f758141482f5d85ac6b30ec4da54269bd2a7c
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 multiple embedded URLs, one of which is explicitly labeled as an external URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to research papers or awards, which is a common tactic for phishing or malware distribution.

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://xezojetit.ru/award?keyword=applied+research+paper+pdf
    • https://cdn.sqhk.co/midipumep/jiJgzjg/41727867979.pdf
    • http://freshmind.net/padi_recreational_dive_planner_metricyz22i.pdf
    • http://luwazesoj.22web.org/what_stocks_to_invest_in_2021_reddit.pdf
    • http://in-step.shop/what_does_non_standard_mail_postage_due_meann3k9r.pdf
    • https://cdn.sqhk.co/daborofus/aid3M54/xbox_series_x_best_buy.pdf
    • https://cdn.sqhk.co/wuwoxegolewa/Fjaxk4Y/low_cost_airlines_flying_to_egypt.pdf
    • http://samabev.iblogger.org/stock_market_simulator_game_free.pdf
    • http://rawapob.22web.org/rifawovurugoxolekixarefe.pdf
    • https://cdn.sqhk.co/wanevakaxuma/ffX1Lif/destiny_child_songs_lyrics.pdf
    • https://cdn.sqhk.co/dejijadu/bgghhhe/xovax.pdf
    • https://cdn.sqhk.co/fodexuxefeba/gdOB6ZG/fist_of_awesome_apk.pdf
    • https://cdn.sqhk.co/lajoroteb/ihLSfie/marketplace_app_facebook.pdf
    • http://instup.xyz/jesus_message_in_telugu_imagesi7hls.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://latowetutut.epizy.com/96843998826.pdf
    • http://vuvumotelikev.rf.gd/37541441209.pdf
    • http://zefuxaninegug.epizy.com/nikon_coolpix_s3300_charger_walmart.pdf
    • http://jorowoti.epizy.com/promissory_note_for_loan.pdf
    • http://jedirolin.rf.gd/barkley_fall_classic_race_report.pdf
    • http://bituwevemexeku.rf.gd/how_do_humans_adapt_to_the_environment_in_mexico.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_off0000e393.bin
4d354359c02463ef8e6aee99c89ea111ccba702e241a880c65d837f86129d0f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xE393 4724 bytes
font_01_sfnt_off0000f3a1.bin
c57c316e07f583d91a1ab67bcb4bce92e9c0dc6758bea0d54f02011674b7dc57
pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A1 10448 bytes
font_02_sfnt_off00011746.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x11746 4324 bytes