Malicious PDF — malware analysis report

Static analysis result for SHA-256 6113f819b21d5575…

MALICIOUS

PDF

80.3 KB Created: 2021-04-05 12:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e53facb1d14d3b750a2af9a3bf8aaac5 SHA-1: e57859e8f0455dba969a764118b8415fdd3e0f5b SHA-256: 6113f819b21d557543914bb671fc7c4138d804086332cd49df1fb54eb70ea090
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, with heuristics indicating the presence of external URIs. While the document body is heavily corrupted, the presence of multiple unknown URLs suggests a phishing or malware distribution attempt. The file's structure and embedded URLs are consistent with a malicious PDF designed to redirect users to potentially harmful content.

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 http://tewosube.mypressonline.com/pdf_to_autocad_converter_online.pdf
    • https://cdn-cms.f-static.net/uploads/4445119/normal_6015a194f3abd.pdf
    • https://cdn-cms.f-static.net/uploads/4466175/normal_60512d207e37e.pdf
    • https://zexawowa.weebly.com/uploads/1/3/6/0/136081798/wegumirarawenamipor.pdf
    • http://dopogabijup.mywebcommunity.org/how_do_i_setup_my_honeywell_thermostat_app.pdf
    • https://titoboxe.weebly.com/uploads/1/3/0/8/130874676/9848986.pdf
    • http://bolipoloweda.mygamesonline.org/ielts_general_module_reading_samples_with_answers.pdf
    • https://sesifubonimexa.weebly.com/uploads/1/3/5/3/135317238/fotavimaxekuk_vazuva_pavak.pdf
    • https://cdn-cms.f-static.net/uploads/4376612/normal_5fd90a6fb5bd9.pdf
    • https://fepapidatimupiv.weebly.com/uploads/1/3/1/4/131437812/2821638.pdf
    • https://static.s123-cdn-static.com/uploads/4466146/normal_5fff931c6d5a0.pdf
    • https://bijadatexate.weebly.com/uploads/1/3/4/0/134013249/dimajibaxatomal-julabusomu-togetoras-kisuzibofonu.pdf
    • https://static.s123-cdn-static.com/uploads/4392237/normal_5ff4fadd8f416.pdf
    • http://nezowigivomi.scienceontheweb.net/wings_of_fire_dragonslayer_book_depository.pdf
    • https://cdn-cms.f-static.net/uploads/4424011/normal_6019afb81a51f.pdf
    • https://jamofavoxaf.weebly.com/uploads/1/3/4/6/134698870/korimenob.pdf
    • https://static.s123-cdn-static.com/uploads/4409840/normal_5fdd26f0bbebe.pdf
    • https://static.s123-cdn-static.com/uploads/4419827/normal_6003dd3e3d512.pdf
    • https://static.s123-cdn-static.com/uploads/4448976/normal_6002125c99217.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=galaxy%20s4%20mini%20battery%20amazon
    • http://gogujigasad.onlinewebshop.net/how_to_add_transmission_fluid_to_a_2000_vw_jetta.pdf
    • http://madepadejatutof.onlinewebshop.net/xosilimola.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_off0000efa3.bin
14dc6c4f9559c07d4a7573d92155956ca746799a33088be13e1cb88c669bdb24		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA3 5100 bytes
font_01_sfnt_off000100f9.bin
007b8891623cb97c55b7030df7d96d5ced13376da44fa5df908498c2e250017c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100F9 10908 bytes
font_02_sfnt_off000125c1.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125C1 4324 bytes

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