Malicious PDF — malware analysis report

Static analysis result for SHA-256 5585d0d4653d0b2f…

MALICIOUS

PDF

76.3 KB Created: 2021-03-23 05:18:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 60df8f6b01f00dbb150cd584c48d5405 SHA-1: e1163c05fdc97c31f67487beadd422923ffe1812 SHA-256: 5585d0d4653d0b2fd0993a51b58fa7de0c7ad30b5697ae41446b5a4f1cd29897
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL pointing to 'zajinet.ru', which is likely a malicious domain used for phishing or malware delivery. The document body, though heavily obfuscated, suggests a lure related to 'easy christmas piano sheet music for beginners'. No scripts were extracted, but the PDF structure and embedded URI heuristic indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=easy+christmas+piano+sheet+music+for+beginners PDF link annotation
    • http://segikusi.22web.org/71246668325.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/aji59wQ/lumusoraxodoruzen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454281/normal_5fd877010f76b.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/asighgz/dragon_stickman_transform_shooting_games.pdfIn PDF document text
    • https://cdn.sqhk.co/sipebililofo/jhdeghT/forgotten_game_of_ur_rules.pdfIn PDF document text
    • http://gagefepinulivaf.iblogger.org/anticonformista_sinonimi_master.pdfIn PDF document text
    • http://domsale.xyz/23595373618om08r.pdfIn PDF document text
    • http://fowagovujag.22web.org/past_tense_worksheets_grade_4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365661/normal_601c69d52d3d2.pdfIn PDF document text
    • http://idealica-italy.site/zirupizinatumuxuvenesumukllol2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471723/normal_602a133ea6e93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407988/normal_60201bd18c2b3.pdfIn PDF document text
    • http://trokot-online.xyz/68928377566mlmrl.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/nefomojuwet/axial_fan_design_calculations.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/ansi_c_programming_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/fts_answer_key_13_october_2019.pdfIn PDF document text
    • http://sutuguve.rf.gd/mebituxum.pdfIn PDF document text
    • http://sojisij.epizy.com/copy_excel_footer_to_all_sheets.pdfIn PDF document text
    • http://rukilokurotog.rf.gd/white_shiplap_paneling_sheets.pdfIn PDF document text
    • http://legujajojozete.epizy.com/makhraj_of_arabic_letters_bangla.pdfIn PDF document text
    • http://zepotusetazokor.rf.gd/dinopiro.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/reticular_formation_mnemonic_device.pdfIn PDF document text
    • http://torasimi.rf.gd/87991153594.pdfIn PDF document text
    • http://guvedizimokid.rf.gd/adobe_animate_cc_free_mac.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE5 5596 bytes
SHA-256: 8de0259df61eb585e284f598054f12e8de891274ca3f1a9441a10c45341397f7
font_01_sfnt_off0000fdcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDCC 10964 bytes
SHA-256: 9ee2035a3de0b0eeca062f8ce26b21119348e7030a0ce25fe92f5268c557f545

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