Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0d00a76946e5ce…

MALICIOUS

PDF

84.9 KB Created: 2021-03-13 12:52:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38f33b97b4c27ade03d5f40498e3ba63 SHA-1: 23b709f4a8f97281a69a31bfe34424d97764b678 SHA-256: 3b0d00a76946e5ce60d009803be4e8c7789714c806e904fb11d7af3739323819
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 'vilenefex.ru', which is likely the malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a potentially harmful site, possibly for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://vilenefex.ru/123?utm_term=injustice+gods+among+us+android+gameplay
    • http://kenufapozij.22web.org/bisabuparoje.pdf
    • https://cdn-cms.f-static.net/uploads/4385862/normal_602b8d6a99917.pdf
    • http://tomogorman.com/ejemplo_de_suma_de_vectoreswv74n.pdf
    • http://jepenufi.getenjoyment.net/98857473301.pdf
    • http://50offshop.pro/english_grammar_exercises_pre_intermediatepxxe8.pdf
    • http://kidobujugi.mypressonline.com/sezuvizimesojixusogosuru.pdf
    • http://mitatizizuje.mypressonline.com/fosizuf.pdf
    • http://gonzo-3d.com/thorax_anatomy_humano0vyr.pdf
    • http://reduslim-ufficiale.website/nisekafoleloluxepupan0dxip.pdf
    • http://sutovuresas.mygamesonline.org/figenugerira.pdf
    • http://garanibukumom.scienceontheweb.net/2010_chevy_malibu_power_steering_pump_location.pdf
    • https://static.s123-cdn-static.com/uploads/4385863/normal_5fc7b989153b9.pdf
    • https://static.s123-cdn-static.com/uploads/4370072/normal_5fe5bb8e41e81.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://bifovigavij.myartsonline.com/how_to_transfer_a_call_using_nortel_networks.pdf
    • http://vadupeti.epizy.com/6.0_powerstroke_turbo_rebuild.pdf
    • https://s3.amazonaws.com/fosagobomap/mariah_carey_songs_hero.pdf
    • http://jurizamumi.myartsonline.com/at_t_u_verse_guide.pdf
    • https://s3.amazonaws.com/safago/sosojilidokinatubo.pdf
    • http://ramigavatezeten.epizy.com/bexetojikakutebu.pdf
    • http://zusomiverufal.rf.gd/xunedum.pdf
    • http://lidufaz.epizy.com/pexej.pdf
    • https://s3.amazonaws.com/sazixipame/how_to_put_ac_on_heat_mode_daikin.pdf
    • https://s3.amazonaws.com/warapagefasovi/18104997727.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e106.bin
8f476a60b397aa10f60536b3b48585d86f7e76450ae907abbfa9c6ca7212b930		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE106 10724 bytes
font_01_sfnt_off00010292.bin
5a8579a7e24100450450f718039baeaf39c344440d5bcc4ef5121a39599ea6d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10292 5392 bytes
font_02_sfnt_off000114d3.bin
a4442fe769e4afa9712771ae11a5fa65b9c1438cd5566ba41b2fee2a8d19ab6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114D3 10160 bytes
font_03_sfnt_off000137a1.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x137A1 4324 bytes

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