Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd42437f8dae4f3…

MALICIOUS

PDF

83.6 KB Created: 2021-04-02 03:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92fa5fc95e27440ef8b13872de109d1e SHA-1: 977cf389410b9d9ad38d599be47478160c31f65b SHA-256: 9bd42437f8dae4f32d141789466cfff925cb6b205df68850d40138c85808f154
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'twilight zone quotes' to entice users to click the malicious link. The presence of multiple unknown URLs further supports the phishing or malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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/strik?utm_term=eye+of+the+beholder+twilight+zone+quotes
    • http://gisujug.mypressonline.com/nodixowa.pdf
    • http://waverufusufafuv.scienceontheweb.net/summary_of_catechesi_tradendae.pdf
    • http://gepopusoka.mypressonline.com/93438217501.pdf
    • https://cdn-cms.f-static.net/uploads/4390350/normal_5fe8bd897b951.pdf
    • http://xedeporib.medianewsonline.com/diguru.pdf
    • http://zukirudon.mypressonline.com/cg_tet_answer_key_2020_download.pdf
    • http://sagunutu.medianewsonline.com/mathematical_statistics_rice.pdf
    • http://gudelew.mywebcommunity.org/pukevojinubuxabaganidisot.pdf
    • http://vixemifojetinag.sportsontheweb.net/how_to_use_a_hamilton_beach_roaster_oven.pdf
    • http://fawotewikobafis.iblogger.org/93381928918.pdf
    • http://juborad.mywebcommunity.org/javascript_tutorial_tutorialspoint.pdf
    • http://mitidogifomasis.iblogger.org/66058858329.pdf
    • https://cdn-cms.f-static.net/uploads/4500669/normal_5fd7bf8948da7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jazuravazaguz/alabama_crimson_tide_injury_report.pdf
    • https://s3.amazonaws.com/zesixefe/covalent_bond_naming_worksheet.pdf
    • https://s3.amazonaws.com/zunaporam/52450490449.pdf
    • https://s3.amazonaws.com/mikibetiv/wejule.pdf
    • http://zapusov.atwebpages.com/engineering_drawing_lettering.pdf
    • http://budobilososuw.rf.gd/baixar_bsplayer_pro_apk.pdf
    • https://s3.amazonaws.com/feliso/kesinevopoziwuvamotolog.pdf
    • http://poxugexi.epizy.com/how_to_start_learn_arabic.pdf
    • https://s3.amazonaws.com/wizomoravazub/jodogojopakasa.pdf
    • https://s3.amazonaws.com/jinotugiwomo/luzodojuwiwap.pdf
    • https://s3.amazonaws.com/sitozi/midsummer_nights_dream_summary_act_4.pdf
    • https://s3.amazonaws.com/sasufufa/usmle_step_1_dates_2021.pdf
    • https://s3.amazonaws.com/ropuba/wadawepopaduko.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_off0001082d.bin
3d05f3a23de68839fd379dc98153748678e06f488b43beeaa0818299d4f8a4f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1082D 5428 bytes
font_01_sfnt_off00011ab8.bin
1d8906811dc46d58ed860eea58ad478944fbbac9e7ce2efb3014b8b15c2c60ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB8 11288 bytes

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