Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae10ee53bd3e531f…

MALICIOUS

PDF

87.2 KB Created: 2021-05-13 10:46:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b71bd5648438b10c7057124410f73888 SHA-1: 2bb4c7d79c57dfa5ac19575881dfdbbf99591be6 SHA-256: ae10ee53bd3e531fd8d861afeb672fef911f2a965974371a5a0d4831db4e35ec
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body references a well-known investor's letter to create a plausible lure. An embedded URL points to a suspicious domain, likely serving as a distribution point for a second-stage payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://kuzutuzo.ru/strik?utm_term=warren+buffett+letter+to+investors+2019 PDF link annotation
    • http://mogimetekojubar.scienceontheweb.net/zeruruvokod.pdfIn PDF document text
    • http://fagilef.getenjoyment.net/jegikaxof.pdfIn PDF document text
    • http://indir-kazan.com/can_you_legally_hunt_an_elephants7u9p.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/jbl_flip_3_will_not_turn_off.pdfIn PDF document text
    • http://copyrightproblem.com/what_is_a_three_prong_thesisryy5r.pdfIn PDF document text
    • http://kiwenalod.medianewsonline.com/siduliretogavujulejunit.pdfIn PDF document text
    • http://ledozikatiresev.scienceontheweb.net/zatumemuzibajar.pdfIn PDF document text
    • http://antonioit.fun/adding_unlike_fractionsmh1br.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wonumafubij/51160881521.pdfIn PDF document text
    • http://bozexobasunuz.rf.gd/98684440105.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/day_timer_template_word.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/sojevimetimilano.pdfIn PDF document text
    • http://gitogopafo.epizy.com/jodijowekiperigavodo.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/choosing_a_medigap_policy_guide_2019.pdfIn PDF document text
    • http://mujawonevafo.rf.gd/how_to_replace_humidifier_filter_on_furnace.pdfIn PDF document text
    • http://giwoxig.rf.gd/73071483561.pdfIn PDF document text
    • http://dopugidov.rf.gd/oracle_administration_workshop_2.pdfIn PDF document text
    • http://retexibew.rf.gd/15307623608.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/bsf_application_form_2018.pdfIn PDF document text
    • http://dumudolaba.epizy.com/georgia_guidestones_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/libeganot/jezubarisizafefidebuzadik.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E2 5340 bytes
SHA-256: c454fae88b1cf50f4bd606112bda089366f8efa5a09fbca022aaaf87d96e0dbc
font_01_sfnt_off00011828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11828 11620 bytes
SHA-256: 29f0fc942bf8c7c6751756b2bce2288cd41aa5922a40b96bed99652be27f4214
font_02_sfnt_off00013f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F99 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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