Malicious PDF — malware analysis report

Static analysis result for SHA-256 769263c551b72086…

MALICIOUS

PDF

78.5 KB Created: 2021-06-01 05:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 21a429845afca4a9acde2fa5d55fbd4d SHA-1: 3d74bc12b79ab6d45be96728f95c20353828200c SHA-256: 769263c551b72086339c7e708e7dbe6bba2faa737e5a9326582d9bf434942730
96 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. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a phishing site. The document body, though heavily obfuscated, appears to contain metadata related to software and dates, potentially serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://xezojetit.ru/123?utm_term=xamarin+forms+bindable+layout+selected+item
    • https://cdn-cms.f-static.net/uploads/4394066/normal_606e2a4ca1edf.pdf
    • https://cdn-cms.f-static.net/uploads/4465249/normal_6062f132bc76e.pdf
    • https://cdn-cms.f-static.net/uploads/4459463/normal_60638776df6fd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3745562f-46d6-4c04-ad11-6f2d6b0e3b80/free_shutter_count_1.54_crack.pdf
    • https://uploads.strikinglycdn.com/files/26afe58e-b3e0-43ab-8ea4-377e82788c29/watch_tv_channels_online_free_apk.pdf
    • http://mefijunov.pbworks.com/w/file/fetch/144425331/what_is_a_mission_statement_example.pdf
    • https://uploads.strikinglycdn.com/files/99ed3a0f-4104-4d7a-9b49-e59d774e1a62/92615028841.pdf
    • https://uploads.strikinglycdn.com/files/e2aa0940-5256-4448-8c7b-58aaaf7ce369/quantum_computing_books_for_physicists.pdf
    • https://uploads.strikinglycdn.com/files/0534fd0e-ffa1-44db-b56d-12419634f149/62751477175.pdf
    • https://uploads.strikinglycdn.com/files/3200920f-73b6-43e6-a9e6-2c9600abf3a6/sibarigokofuwuliseki.pdf
    • https://uploads.strikinglycdn.com/files/d8133245-b2d7-4f1e-baf6-d04320748732/kejajowugula.pdf
    • https://uploads.strikinglycdn.com/files/67b1fe20-1a0a-4702-bba9-2477baca9ae4/joletalojoxek.pdf
    • http://pokuwatosat.pbworks.com/w/file/fetch/144433524/42387332358.pdf
    • https://uploads.strikinglycdn.com/files/77ab435b-f4a8-4286-9808-9b32bc49dba6/sifinisupajo.pdf
    • https://uploads.strikinglycdn.com/files/94e9ec09-5f07-4ccf-bea0-85bbe4e118f5/griffith_quantum_mechanics_problems.pdf
    • http://foziwedugumu.pbworks.com/w/file/fetch/144432636/how_hard_is_the_padi_open_water_test.pdf
    • https://uploads.strikinglycdn.com/files/bb2c1b5d-2585-45f6-8045-93d5c6da19cb/pugasujepifapodu.pdf
    • https://uploads.strikinglycdn.com/files/bc6f1511-5c1e-4592-9741-2fcac2844816/how_to_trigger_disaster_cities_skylines.pdf
    • https://uploads.strikinglycdn.com/files/43c1430a-f5a2-4898-85a9-685b5e05d246/interview_questions_and_answers_for_service_coordinator.pdf
    • http://pevozowo.pbworks.com/f/the_believers_authority_andrew_wommack.pdf
    • https://uploads.strikinglycdn.com/files/aadc3eae-c021-4af7-8b48-79f9975580c1/niv_life_application_study_bible_premium_leather.pdf
    • http://pezeliv.pbworks.com/w/file/fetch/144426918/el_cuatrero_pelicula_completa_vicente_fernandez_el_arracadas.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_off0000f3e5.bin
fec8f906615ec29cfcee29b88250a5927cf9d1dc7d6722239972ed9eb513fcf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 5388 bytes
font_01_sfnt_off00010627.bin
9ea9c7cdee8acfc2195ae69c90e9aeef12a0f8d19fe5325605e4be23e5d15a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10627 10664 bytes

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