Malicious PDF — malware analysis report

Static analysis result for SHA-256 8261ce638b6a85b6…

MALICIOUS

PDF

344.8 KB Created: 2021-03-25 08:15:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 33a6d94ae93026eee9be303a182a96f3 SHA-1: ee930efebd7d7061131d41cc3eff85daa0fe841c SHA-256: 8261ce638b6a85b665ce3d2a760f7c338f8951d25232d8d8c756835d9891bd6f
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical detection score. It contains an embedded URI pointing to a suspicious domain, 'botokaw.ru', which is likely used to host a malicious payload or phishing content. The PDF structure itself shows signs of manipulation, including duplicate object bodies.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9845

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://botokaw.ru/award?keyword=structure+of+vascular+cambium+pdf PDF link annotation
    • http://iranomics.com/34221708702mho7a.pdfIn PDF document text
    • https://cdn.sqhk.co/gadewekunel/gBIKSGX/doodle_basketball_2_apk.pdfIn PDF document text
    • http://vipmanmarket.space/42168355111po08y.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/gsOh8Wn/54391931566.pdfIn PDF document text
    • https://cdn.sqhk.co/bukevexej/i2ieijg/firawozad.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/bowuvagunamufurifu4liot.pdfIn PDF document text
    • http://kapusta.pro/76825598129wyfov.pdfIn PDF document text
    • https://cdn.sqhk.co/radofufalam/jcV08hf/xejigomam.pdfIn PDF document text
    • http://otomail.business/the_lpa_anatomisedslf7g.pdfIn PDF document text
    • https://cdn.sqhk.co/wepigosogo/jjCjhhj/mx_player_app_not_installed.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/lijulijowivaze/always_be_my_maybe_2016_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lomiwexuva/66676797650.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/80411635919.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/tecumseh_small_engine_surging.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d7086a6-a908-4bd0-9885-decad0d06bab/nordictrack_x9i_treadmill_price.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/tewofudagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56d5ed82-15bb-4e47-8800-06a2154a455b/farming_simulator_2015_xbox_360_money_cheat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95d30d31-ca22-4a4b-8472-07f792e48b92/mitigukupisem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23b806cd-86cb-4624-97c5-0a76e8ca985d/how_to_write_an_introduction_paragraph_for_a_rhetorical_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2fd030-2e3b-4fcb-9919-402fd0de5097/10111825051.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/atheros_ar9271_wireless_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ca1ec41-c3cf-4306-8461-c7d43786c0ea/what_is_the_difference_between_beretta_a300_and_a400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25f6df77-c54b-460d-8b3c-46cde03181a6/photosynthesis_diagrams_worksheet_biology_junction_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/lufakovotaditew.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_off0004febf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEBF 5604 bytes
SHA-256: 26f1c5c5725ddf670b8aecacda57a0d2db4b09e8518217eebf76f695f1ba2099
font_01_sfnt_off000511ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x511BA 14352 bytes
SHA-256: 4599dbb4436a92672b745b63fe13e8f0439f1b66fec720043d7f5821a3964661
font_02_sfnt_off00053e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53E9D 16148 bytes
SHA-256: ebaa9d42c58e3fd25c8264bcf4ef2319fee467c92cf53dcc1f377a20fc8d39b0

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