Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc928ea8d422a355…

MALICIOUS

PDF

255.5 KB Created: 2021-04-02 11:43:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5f22eff45af3455b71a9c563019777c6 SHA-1: 63cd7515008468328c628357b3fb3f7fc56ef76f SHA-256: bc928ea8d422a355dcf5867cd6825616e7bd30fe14df586f0f3bb227bf462ebe
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 an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a malicious website. The document body, though heavily obfuscated, contains text related to the URI, suggesting a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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://jumiwimov.ru/strik?utm_term=what+was+israel+called+before+palestine PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4377908/normal_602bb36b55e65.pdfIn PDF document text
    • http://zurabutodiriwa.22web.org/46041029591.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/iighagf/74741946241.pdfIn PDF document text
    • http://jujibej.iblogger.org/gloria_victis_new_player_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/7gh6Fsz/41968709171.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477910/normal_6019addc0c304.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/blaupunkt_tv_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/new_kill_team_starter_set_review.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/judulaw.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/shandar_movie_song_video.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/punobodozimok.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/denotojekuvuw.pdfIn PDF document text
    • http://zukizibukuxupir.epizy.com/how_to_tell_winchester_model_94_pre_64.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/wedding_anniversary_cards_psd_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/the_new_detectives_written_in_bone_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/how_to_practice_socratic_questioning.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/4756478761.pdfIn PDF document text
    • https://s3.amazonaws.com/jedobufudajewu/brochure_templates_word_two_fold.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/kelly_services_careers.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/citrix_receiver_update.pdfIn PDF document text
    • http://wipapirub.epizy.com/70090580076.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/in_on_beside_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00039505.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39505 5488 bytes
SHA-256: 4dd43fa6df160db271353c18ff1a9ebd1d71c28e074c8e16b1d9baef65c29828
font_01_sfnt_off0003a7ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3A7BA 15660 bytes
SHA-256: a52a67cf348afe6191deb89c4ec55da21bd71f10d54679fcdcf33805f9297239
font_02_sfnt_off0003d96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D96E 16136 bytes
SHA-256: c47786061d4a35b859cbddbc9b7baa8b538624f6bb15b501dbab5dbc7a3703fe

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