Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce4ce730ae364cc…

MALICIOUS

PDF

89.7 KB Created: 2021-04-07 10:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b47bc81d308af9a4d1da42afd7dee6b4 SHA-1: 2c3855caac879d076a57435fe27fe8aaca5266a8 SHA-256: dce4ce730ae364ccaecbe3544fc179fdd45aa910acb34c101ca3fd576624bbf8
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, indicating a high likelihood of malicious intent. The primary indicator is an embedded URI pointing to 'https://jumiwimov.ru/wix?keyword=how+many+things+are+there+vsauce', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'vsauce' and 'wkhtmltopdf', suggesting a lure to a fake search result page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/wix?keyword=how+many+things+are+there+vsauce
    • http://sekujirimabasas.getenjoyment.net/20968132395.pdf
    • https://cdn.sqhk.co/kisibijobu/bhhpgiG/90659470003.pdf
    • http://tryse.xyz/6339085802bjnhb.pdf
    • https://cdn.sqhk.co/tewokozogop/jh6ghif/football_predictions_nfl_week_1.pdf
    • http://chambre.xyz/how_to_adjust_cycleops_mag_trainerb4t2v.pdf
    • http://limezage.scienceontheweb.net/contact_angle_wettability.pdf
    • http://italywow.space/best_prices_for_lg_washer_and_dryer8i35n.pdf
    • http://hargotel.xyz/85970113162k88ko.pdf
    • http://kiwirixup.22web.org/modelo_de_memorandum_de_llamada_de_atencion_en_word_colombia.pdf
    • http://kukezezexez.iblogger.org/definition_of_noun_phrase.pdf
    • http://afterdealer.pro/53823763041zeqxb.pdf
    • http://davupopebuwiser.sportsontheweb.net/57782454754.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://dusekamalebe.rf.gd/alice_in_wonderland_book_free_download.pdf
    • https://s3.amazonaws.com/tojazudibumogab/hoover_windtunnel_2_whole_house_rewind_upright_vacuum.pdf
    • http://vaxapikezojupid.rf.gd/mugunebelaf.pdf
    • https://s3.amazonaws.com/vukujidor/eragon_book_for_sale.pdf
    • http://xuxalonitu.onlinewebshop.net/vosenofem.pdf
    • http://pakewon.rf.gd/50166256292.pdf
    • http://parezorizujax.rf.gd/bluetooth_update_for_macbook.pdf
    • http://lofunadex.myartsonline.com/61355104663.pdf
    • https://s3.amazonaws.com/gumegulaxi/57238013960.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_off000111f4.bin
36b2306e84ee48cb2d7f0c4fb6d83c00743686c3825880f6a77f1867c3200383
pdf-font-stream PDF embedded font (sfnt) at offset 0x111F4 5276 bytes
font_01_sfnt_off000123ce.bin
bb2ec7d68bf918e621e4330e0043cc86cb40cd7951fbd14a942d9b9a5c4f0d1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x123CE 11588 bytes
font_02_sfnt_off00014aef.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AEF 4324 bytes