Malicious PDF — malware analysis report

Static analysis result for SHA-256 c383594660ac6df5…

MALICIOUS

PDF

77.1 KB Created: 2021-03-11 05:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35c30f13f0b15e6ccb2323ae6e086c6a SHA-1: 76e71008015b4eb25830d5e73d00feff806855b3 SHA-256: c383594660ac6df523d10f365094988e889ab58f0af68c3afde1ce3bce48dca9
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a PDF file flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. The 'SE_CLICKFIX' heuristic strongly suggests a social engineering attack where the document prompts the user to run a command, likely to bypass security measures and execute a payload. The embedded URL points to a suspicious domain, further supporting a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://pelibifir.ru/strik?utm_term=how+do+you+turn+on+hp+wireless+keyboard
    • http://pay-order.info/yahoo_for_laptop_windows_7se3og.pdf
    • http://lastmarkt.ru/78257617742rl21x.pdf
    • http://timurberg.ru/how_to_load_an_electric_stanley_stapler6n6yq.pdf
    • https://cdn.sqhk.co/rularijulen/mPijBgg/skater_dress_pattern_simplicity.pdf
    • http://hydraruzxpnew4af.exchange/99108273208yd0h7.pdf
    • https://cdn.sqhk.co/tororukiwuri/jgjRybG/kpop_store_las_vegas_strip.pdf
    • http://reduslim-official.website/indonesia_visa_application_form_sydneyihb8n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/kevava/new_orleans_saints_injury_report_week_6.pdf
    • http://nukivamo.myartsonline.com/subject_verb_agreement_worksheets_with_answers_7th_grade.pdf
    • https://s3.amazonaws.com/tezude/receipt_voucher_template.pdf
    • https://s3.amazonaws.com/xapota/swarna_akarshana_bhairava_images.pdf
    • https://s3.amazonaws.com/jiwisi/free_card_games_online_no_required.pdf
    • https://s3.amazonaws.com/dinilederu/3977341606.pdf
    • https://s3.amazonaws.com/fezenur/new_bollywood_songs_dj_mix_free.pdf
    • http://vibirokudod.myartsonline.com/98977541767.pdf
    • https://s3.amazonaws.com/mefadedosuw/83069170422.pdf
    • https://s3.amazonaws.com/lekizopiloref/dodge_ram_factory_parts.pdf
    • https://s3.amazonaws.com/xezonijida/60483178227.pdf
    • https://s3.amazonaws.com/fukepez/57740884271.pdf
    • https://s3.amazonaws.com/tapexiw/verb_grammar_exercises_with_answers.pdf
    • https://s3.amazonaws.com/pojikovewijeja/xbox_one_gamepad_bluetooth_version.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_off0000e0d7.bin
7955f0ec3ea1bb144ecae8ac0ff106e5129310a46127bd3ada5898b57dde6ca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 5288 bytes
font_01_sfnt_off0000f2c9.bin
0e8ab6bb04db783f6b3e78380400467e68cc7222e9569519edff57ad81afc322		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C9 11248 bytes
font_02_sfnt_off0001191c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1191C 4324 bytes

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