Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3e60203ce019737…

MALICIOUS

PDF

83.2 KB Created: 2021-03-25 02:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aae292542ee25b47ca26d6d5efa96f04 SHA-1: 1153a64ed616ac5823d2ffc6b18b1395af3272ef SHA-256: b3e60203ce019737ed3d41fc7eddca825a4ae81055ab068cb339ca23db73b33b
136 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to 'polktaxes.com renew online' and the wkhtmltopdf application, suggesting a lure. The presence of external URLs, including one pointing to 'druttle.ru', indicates a potential redirection to a malicious site for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://druttle.ru/wix?keyword=polktaxes.com+renew+online
    • http://parralax.net/what_is_universal_field_theorys86b6.pdf
    • http://maxist.ru/rogue_legacy_ps4_metacritict4m53.pdf
    • http://montana-media.com/vasikurunaggaydq.pdf
    • http://spainsale.pro/how_to_read_log_chart7otzf.pdf
    • http://rubyshup.space/the_prayer_pianoenbl9.pdf
    • http://avtoshtorki.shop/ziwulafupafidwwdl.pdf
    • http://citrus-fruit.space/tupevemevokebogixoj4gb03.pdf
    • http://summ-green.fun/icy_veins_fury_warrior_dps_guideklbst.pdf
    • http://istlan.fun/serato_dj_lite_vs_djay_pro_2im91q.pdf
    • http://prizinsta.online/what_is_the_best_portable_air_conditioner_to_buy42p3z.pdf
    • http://telgrm.site/concept_sheet_architecture_pinterestj3luw.pdf
    • http://skidki-day.store/sportdog_training_collar_not_working2t8h1.pdf
    • http://nextauto02.ru/rulujotarx2qsg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/9e63f583-d1c2-4aad-ac50-40f6f55b4e59/jimoratu.pdf
    • https://uploads.strikinglycdn.com/files/ac56182d-de71-4b73-9d27-89ee1128226f/fidejidirikabibemol.pdf
    • http://pupuwejerew.epizy.com/sodinujujemamiraseserari.pdf
    • http://ravuxigud.epizy.com/cfr_cluj_napoca_informatii.pdf
    • https://uploads.strikinglycdn.com/files/88b1d506-e5e2-4ad2-b535-5dd91668a87d/renugumedekuwij.pdf
    • https://uploads.strikinglycdn.com/files/63aaa9e3-5126-4ad5-8e50-96417244a03d/design_of_concrete_structures_darwin.pdf
    • https://2e03c77f-99cc-4591-9807-54d8d49c9ce6.filesusr.com/ugd/759733_326970a21b83423494e3d9627da295dd.pdf?index=true
    • https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_b031b267b983406ba1f64ec13fe68c8d.pdf?index=true
    • http://pitupeg.epizy.com/ivy_global_sat_2_hr_diagnostic_answers.pdf
    • https://uploads.strikinglycdn.com/files/8d06831a-e7bb-48d3-bb8a-28ecb2c05990/zerubasokore.pdf
    • https://584dc5e1-4449-4bca-b3d9-d0e1fa08a972.filesusr.com/ugd/185caa_8926e05b7b25474990cea156478a0362.pdf?index=true
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_d564d25bf5e34624981c6c0efe825191.pdf?index=true
    • http://siwinigap.epizy.com/canon_eos_rebel_t2i_user_manual.pdf
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_6cd2dc9842c74cdda54c5dadf57da076.pdf?index=true
    • 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_off0001084d.bin
e865e031a80b86e8cbc3ab058636691f2e7721f5d62119058f310a5e36651734		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1084D 5204 bytes
font_01_sfnt_off000119fc.bin
aeb602e5688aec4308a667acdaf5f84d8908a4cc456317bdfa5b8864d8279aeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119FC 10792 bytes

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