Malicious PDF — malware analysis report

Static analysis result for SHA-256 542a332794323ad7…

MALICIOUS

PDF

76.5 KB Created: 2021-03-21 09:52:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d33c345cfd26bbbbbe372a86b5e47d62 SHA-1: 57888883c673b49b5b57274a6dca89309d2f6f72 SHA-256: 542a332794323ad74af8070dc676a0710a0da1cbb640b2c418cd77bff1bf043d
96 Risk Score

Malware Insights

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

The file was detected as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to 'kuzutuzo.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/strik?utm_term=hp+z420+motherboard+v2
    • https://cdn.sqhk.co/vuwonesi/xibhc4u/34425498836.pdf
    • http://2020coupons.info/kubuzovokanojalidum1ccpu.pdf
    • http://buytoday.cc/manuxononogivevijutoji3590.pdf
    • http://podarokinsta.site/sulezikuumjns.pdf
    • https://static.s123-cdn-static.com/uploads/4379384/normal_600514eb18924.pdf
    • http://koteyarn.moscow/adafruit_io_android_appdnsgm.pdf
    • https://static.s123-cdn-static.com/uploads/4476152/normal_6001281e269be.pdf
    • https://cdn.sqhk.co/pisomuma/bjbY1ja/24741215321.pdf
    • https://cdn-cms.f-static.net/uploads/4463005/normal_5fe8ece939297.pdf
    • https://cdn-cms.f-static.net/uploads/4407301/normal_6023ef4e935ea.pdf
    • https://cdn.sqhk.co/mipijotom/Xhegdia/adafruit_audio_fx_sound_board_16mb.pdf
    • https://cdn.sqhk.co/gubogezemazo/u5jchgf/rukekulularafidagipa.pdf
    • http://yesnutural.space/affidavit_of_loss_prc_id2rl8n.pdf
    • http://groshyk.site/2898812229hi38z.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/faduxodiwo/zolegapegel.pdf
    • https://s3.amazonaws.com/bezutu/4475324534.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebed.bin
47c47fa6af03cfa015ba467a0edad1a6dc494485e17e38382b818095aaeadf90		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 5564 bytes
font_01_sfnt_off0000feb5.bin
93ec90591a47fc81d6241519633949a35631573a4c31ae2a325431e148ba8dcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB5 11404 bytes

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