Malicious PDF — malware analysis report

Static analysis result for SHA-256 f10ecd3cdc10a0d6…

MALICIOUS

PDF

96.2 KB Created: 2021-03-19 08:26:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be803a3ab662a6b3ca79c7d6a506db9d SHA-1: 40bd57f17821a7c72a3d03ee2e07ac5cf9891a13 SHA-256: f10ecd3cdc10a0d60c489bfd664b050e3a63c7068446e28173cc025e83e23f24
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains keywords related to downloading a PDF, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://nipisod.ru/award?keyword=lldm+coro+cantos+download+pdf
    • https://cdn-cms.f-static.net/uploads/4365586/normal_604460594d54e.pdf
    • https://cdn-cms.f-static.net/uploads/4385436/normal_603ca86940ac0.pdf
    • https://cdn-cms.f-static.net/uploads/4368495/normal_5fd8e8083e746.pdf
    • https://cdn.sqhk.co/wagomito/j84Aoii/classic_arcade_52_in_10.pdf
    • https://cdn-cms.f-static.net/uploads/4480423/normal_60152446ddecb.pdf
    • http://kuvesukide.iblogger.org/can_you_use_elgato_with_obs.pdf
    • https://cdn-cms.f-static.net/uploads/4471230/normal_602494b377400.pdf
    • https://cdn-cms.f-static.net/uploads/4481403/normal_5fd906ddaa8ba.pdf
    • https://cdn-cms.f-static.net/uploads/4385863/normal_601ca6ac240be.pdf
    • https://cdn.sqhk.co/tunaluvum/ggjdlSK/55440811819.pdf
    • https://cdn-cms.f-static.net/uploads/4489992/normal_6042f04846842.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pululusodogi/88804265047.pdf
    • https://s3.amazonaws.com/kegubinefuda/nositekover.pdf
    • http://gurajitobad.rf.gd/garment_manufacturing_industry.pdf
    • https://s3.amazonaws.com/lovetijif/piglet_ears_headband_template.pdf
    • https://s3.amazonaws.com/muwemivumazulax/jukanasarujekipedozojaso.pdf
    • https://s3.amazonaws.com/dotivaf/baby_g_shock_manual_5338.pdf
    • https://s3.amazonaws.com/xeropizuwe/9728313692.pdf
    • https://s3.amazonaws.com/pogolo/bcdedit_set_default_useplatformclock_true.pdf
    • http://womutefipile.epizy.com/4th_grade_reading_comprehension_skills_worksheets.pdf
    • https://s3.amazonaws.com/dumupa/37347392596.pdf
    • https://s3.amazonaws.com/degagaziv/bosch_microwave_repair_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec4.bin
55243b1a37e22ee196f0d5af1d6d5d8d2895ec1c2ebc023374e663ac526e6090		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC4 23520 bytes
font_01_sfnt_off00013888.bin
f9049b4acf801353fe258c6f26021caf1a0b80f3d2b11901dfcfbe6a88a0b96c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13888 5336 bytes
font_02_sfnt_off00014aaa.bin
fc647c2c91c57263168c01b09f0aa16d9ca250f9b1957f9817c08ebe7adab915		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AAA 11664 bytes

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