Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff0a0b88d3a47f5e…

MALICIOUS

PDF

106.2 KB Created: 2021-03-06 01:13:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f8a0067c27551f43d0b5f95c0436d560 SHA-1: 28cb6c9d682f8826cd18495334e15b5df03b2c2d SHA-256: ff0a0b88d3a47f5e716bf9a683fb86a378dd7d1ffefb6147b91cf999803338ff
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a phishing or malware distribution site. The presence of embedded URLs and the overall detection score strongly suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://midufefew.ru/wix?keyword=persona+3+moon+social+link+reverse
    • http://navaram.online/697000656759g5cs.pdf
    • http://xolokukifimiv.sportsontheweb.net/88447361295.pdf
    • https://cdn.sqhk.co/pulovafafita/1DQicbQ/mechanicsburg_pa_dirt_track.pdf
    • http://tonedomopoja.scienceontheweb.net/silver_eyes_fnaf_book.pdf
    • https://cdn.sqhk.co/wojipezusax/gigFIib/kiluwok.pdf
    • http://katipef.medianewsonline.com/diary_of_a_wimpy_kid_dog_days_full_movie_cast.pdf
    • http://vehicleusains.com/479054499597elyr.pdf
    • https://cdn.sqhk.co/kodivitedi/djjshdM/motogp_qualifying_results_aragon_2019.pdf
    • http://rolapisi.scienceontheweb.net/dobiwefase.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://doriponesarom.myartsonline.com/fiber_optic_sensors_book.pdf
    • http://pimobepetokonud.myartsonline.com/what_is_a_simple_molecular_solid.pdf
    • https://s3.amazonaws.com/gezizefefififa/28802009405.pdf
    • https://s3.amazonaws.com/wobuzisibal/54787755509.pdf
    • https://s3.amazonaws.com/fatisake/reformas_borbonicas_resumen.pdf
    • https://s3.amazonaws.com/fatisake/ashton_manual.pdf
    • https://s3.amazonaws.com/sefabe/ronubo.pdf
    • https://s3.amazonaws.com/tiniruru/buzepifezuwisobo.pdf
    • https://s3.amazonaws.com/wewiro/tupefedukojebepebugakom.pdf
    • https://s3.amazonaws.com/bofake/asmaul_husna_dan_artinya_muslim.or.id.pdf
    • http://bufijonewufo.onlinewebshop.net/xutaxodetitemunujinijole.pdf
    • https://s3.amazonaws.com/zufaxepixiguxax/ganeji.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013cbf.bin
33b2bcfd1df3a99d7d7ff237542e166794aef7948a1667576bc07f3e4e2af9bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBF 5388 bytes
font_01_sfnt_off00014fcc.bin
b9b7bee1b7b6630f45d6d026c78f0d5b3fc279cd9a5e51cfd62088f9a2b1db90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14FCC 5232 bytes
font_02_sfnt_off00016187.bin
846211f736ad27a630952d2d0cc359e6425a397c2e0c296ae07175f85bc0a1cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16187 10400 bytes
font_03_sfnt_off0001855d.bin
840aca7af89d6665d446bd68a022ef871a8c4a07170005e3094ac854b8115bb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1855D 16240 bytes

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