Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63a3b0db8f4c8dd…

MALICIOUS

PDF

75.1 KB Created: 2021-03-07 13:00:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74214da78226ec9790ddab53e84c439d SHA-1: 759fdcd32061d9f5dabf4fcd2a76d81dbd947ebf SHA-256: b63a3b0db8f4c8ddc578e5b771bbedf34bd487b26c20b4d868d1f1c61da2f92c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains multiple embedded URLs, with the primary one being https://jacksth.ru/wix?keyword=fate+go+maintenance, suggesting a phishing or malware distribution attempt. The PDF structure and embedded content, though heavily obfuscated, indicate it's designed to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://jacksth.ru/wix?keyword=fate+go+maintenance
    • http://lizoguxumugef.mywebcommunity.org/27799961183.pdf
    • http://picsonair.com/android_operating_system_software_downloadjikua.pdf
    • http://davupopebuwiser.sportsontheweb.net/83939735905.pdf
    • https://cdn.sqhk.co/tixukiko/jgigeuF/sasuti.pdf
    • http://nejevefivi.mypressonline.com/45777341645.pdf
    • https://kinojapi.weebly.com/uploads/1/3/2/3/132302846/kofapimavujazuva.pdf
    • https://kigolakelo.weebly.com/uploads/1/3/1/3/131380934/vivofagej_jixobirake.pdf
    • https://cdn.sqhk.co/petawelesup/SgiLqU7/our_solar_system_planets_and_moons.pdf
    • https://werotibumef.weebly.com/uploads/1/3/4/9/134900185/3bcc436eaf0.pdf
    • https://zavamemedu.weebly.com/uploads/1/3/4/3/134305249/borupe-gawaxuxopuk.pdf
    • http://bomisedoxu.mywebcommunity.org/omron_step_counter_hj-321_pedometer.pdf
    • http://reduslim-italiaufficiale.site/vozaxojikikakadavebrm4bj.pdf
    • https://cdn.sqhk.co/rebamomidaw/hg5jhgi/impossible_bottle_flip_apk_download.pdf
    • https://jinajifija.weebly.com/uploads/1/3/4/8/134889339/wedusub_xojowumuwun_zabaxafurupose_zikufiras.pdf
    • https://refugisedenofa.weebly.com/uploads/1/3/1/3/131380322/gevanonol_galanolofo_votodexefib.pdf
    • http://detonic-official.website/dubanvyu27.pdf
    • https://cdn.sqhk.co/fotutubujuf/gmjbNjd/kifokojujolonabitut.pdf
    • https://tiruvodeg.weebly.com/uploads/1/3/4/8/134892329/nelixojav.pdf
    • https://remurefovedelag.weebly.com/uploads/1/3/1/8/131860204/7963570.pdf
    • https://cdn.sqhk.co/xufaribo/opijNfw/rulejixa.pdf
    • http://youtube-subscribes.com/13893751364lquqx.pdf
    • https://berekiba.weebly.com/uploads/1/3/1/4/131482976/kazokidogukum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wemofodi/98678550522.pdf
    • https://s3.amazonaws.com/lepefi/cyberpower_1350avr_software.pdf
    • https://s3.amazonaws.com/pasutiz/how_did_you_learn_html_and_css.pdf
    • https://s3.amazonaws.com/fazujo/how_do_you_change_the_battery_in_a_liftmaster_garage_door_opener_remote.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_off0000ebaa.bin
ebec543569440f1e2982075a8a5d24a7e22cf146b6ce1ccacbecb0b443bd52ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAA 4768 bytes
font_01_sfnt_off0000fbdb.bin
c9f2475a94bcabbcc183f5ece6d0f5b04b6b405ce2e33c9babdfcf7a92fdac6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDB 10256 bytes

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