Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e0d5ede56870832…

MALICIOUS

PDF

95.7 KB Created: 2021-03-29 08:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c683748ae3d84edbfb9373e48f6afea5 SHA-1: 9ab56fbcc9c6941ca35be13a534ba67f0816ad0f SHA-256: 4e0d5ede568708324315adebfaafed13dfee94b0745860d897c77c87c8e87d5e
104 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 heuristics indicating it contains an external URI and uses an invoice/payment lure. The embedded URL, https://botokaw.ru/wix?keyword=west+b+study+guide, is the primary indicator of compromise, likely leading to a phishing or malware download site. The document body, though heavily obfuscated, suggests a 'study guide' theme, aligning with the SE_INVOICE_LURE heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=west+b+study+guide
    • https://cdn-cms.f-static.net/uploads/4367905/normal_6045e3ae2b4fd.pdf
    • https://cdn.sqhk.co/jugomuzuteb/HidkC1S/modhub._us_farming_simulator_2015.pdf
    • http://bu-markett.com/ximujemetedotodevipokeveg4yvpi.pdf
    • https://cdn.sqhk.co/mitajaso/anjaheI/application_letter_sample_for_job_vacancy.pdf
    • http://naturfresh.space/perfect_english_grammar_past_simple_exercises_irregular_verbscys39.pdf
    • https://cdn.sqhk.co/muligumixe/LLmiajj/4x4_mountain_car_driving_mod_apk.pdf
    • http://laxofetiduwi.iblogger.org/xetivevofedulewegam.pdf
    • http://slmit.fun/kitchenaid_ksm3316xwh_artisan_mini_stand_mixer-_whitef72i4.pdf
    • http://vebafaguxaw.22web.org/29265090950.pdf
    • http://scarcebook.com/journeys_end_review_mark_kermodee2i7c.pdf
    • http://my-favshopf.online/us_coast_guard_marine_safety_alert_03-09wapep.pdf
    • https://cdn.sqhk.co/jawefujivi/YgehjaR/big_bang_theory_amy_evolution.pdf
    • https://cdn-cms.f-static.net/uploads/4459163/normal_6034f6d97e32c.pdf
    • https://cdn-cms.f-static.net/uploads/4383572/normal_604e7b2112b98.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ea2e466a-f09f-4f27-8c2f-0c40b20d09c8/naze32_rev_6_betaflight.pdf
    • https://uploads.strikinglycdn.com/files/866d0d76-7490-4ab3-9036-b7434f7827b8/ancient_greece_religion_and_culture.pdf
    • http://tetasafireras.rf.gd/43041906029.pdf
    • https://uploads.strikinglycdn.com/files/0fe8901b-cf6b-42df-8d28-2321133dddcd/4840353590.pdf
    • https://uploads.strikinglycdn.com/files/121c9c77-0fe8-4626-802b-fc9b69d4b99e/60138358181.pdf
    • https://uploads.strikinglycdn.com/files/4063ab72-264f-46a8-b7f7-6bd795576d8a/python_3.6_download_windows_7_32_bit.pdf
    • https://uploads.strikinglycdn.com/files/a9c6f853-d8f0-45ac-bc8e-8b2ea4d906fb/kobalt_wet_tile_cutter_parts.pdf
    • https://uploads.strikinglycdn.com/files/00e9d50e-e2bf-4614-9957-265a0c780520/70576538948.pdf
    • https://uploads.strikinglycdn.com/files/cb33656e-2770-4bad-b1a1-2ec7dc2d5679/danby_designer_mini_fridge.pdf
    • http://guxudapese.epizy.com/6684162487.pdf
    • https://uploads.strikinglycdn.com/files/16ebbdeb-3ab4-464a-bd69-8c9521d2718b/fasugipedegozegizovum.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000122bd.bin
f28b6969d4016eae8f556d92461ed45f4c8e8f98caef31c96a763baabba69ff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122BD 4908 bytes
font_01_sfnt_off0001339c.bin
451d88680860712fc3fa2020d7fe71c81b820780d08d39329508238018700a6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1339C 11372 bytes
font_02_sfnt_off00015a89.bin
1ad30dd47fee4d3db7941b4d3dcb324bc5ea629e4afc38f8bd2427cb89640676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15A89 16096 bytes

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