Malicious PDF — malware analysis report

Static analysis result for SHA-256 104c5abcc2d17c7c…

MALICIOUS

PDF

109.2 KB Created: 2021-03-17 11:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 263a3a230683e3f62636f4b6d656bc18 SHA-1: 2ef2fa95f24f4a41d5cf800d7c66ee3941800bce SHA-256: 104c5abcc2d17c7cedd01ad0d38487832f39e6077e5ff4c85e63ad9270605cd2
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 as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The PDF structure and embedded content suggest an attempt to disguise malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://crophysi.ru/wix?keyword=d%2526d+5e+bugbear+race+stats
    • https://cdn-cms.f-static.net/uploads/4454419/normal_603a20ad2f681.pdf
    • https://cdn-cms.f-static.net/uploads/4490724/normal_5fdb2545ac568.pdf
    • http://vetobiz.sportsontheweb.net/tevezodonos.pdf
    • http://selozufuwadapuw.66ghz.com/94306890489.pdf
    • https://cdn.sqhk.co/lilaxikixo/c8PsNZP/nuniguledefilobivu.pdf
    • https://static.s123-cdn-static.com/uploads/4487935/normal_6008d21144e14.pdf
    • http://jekeluxuto.mywebcommunity.org/65160822517.pdf
    • https://cdn-cms.f-static.net/uploads/4502833/normal_604bbaf9831d4.pdf
    • https://cdn.sqhk.co/fosojatesog/Mgie5if/mission_igi_free_shooting_games_fps_apk_download.pdf
    • https://cdn-cms.f-static.net/uploads/4394082/normal_604b922e615b3.pdf
    • http://kikababono.mywebcommunity.org/20133167765.pdf
    • https://cdn.sqhk.co/xoraxuvonaf/cgTieIW/80021802726.pdf
    • https://cdn.sqhk.co/xuvetuzaxi/phihihh/pufeta.pdf
    • https://static.s123-cdn-static.com/uploads/4502268/normal_5fc79f7ddb3dc.pdf
    • http://zupedaganivo.66ghz.com/41167233756.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wawuzir.epizy.com/zatoxaxibifu.pdf
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_dede1630da19479899fefe7cc71d35cb.pdf?index=true
    • https://3fb740b9-71d8-4183-8edb-de11b68c0a29.filesusr.com/ugd/1fbf8b_fbee1bca3f524040adb84d5e0bda6205.pdf?index=true
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_1eca295298d542f396159d75a0426765.pdf?index=true
    • https://7e073981-ad1c-4081-8dc0-76946ba36063.filesusr.com/ugd/c4f63d_37fac47ed67d4b479450c53f4c302f89.pdf?index=true
    • https://f6142301-0c02-44dd-b2c5-62cf9b3cd0dc.filesusr.com/ugd/ebfdba_a92ab6226916424589bac411b53ffbcb.pdf?index=true
    • 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/
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off000193e1.bin
b05d02c61ea01b887f89ffee6a8a3c7da1c826af5b3e3bcae1cf332f790618e7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x193E1 6504 bytes
font_00_sfnt_off000108ff.bin
03de04004cdd807ea9c269500cd56b06efda50ff8db7b95da1d31ce30d174ec3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108FF 7516 bytes
font_01_sfnt_off00011c84.bin
b72324bf9fb2f960ad531a0c7fe13c100795e1c8b461db9e4f4d6c8496002b7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C84 3148 bytes
font_02_sfnt_off000127c3.bin
d9d9eb8b5a67a8494ca5a9593d54773c41ba913a17cb426b52e0a193c0b11448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127C3 4156 bytes
font_03_sfnt_off000135b1.bin
f19737e7ae504a93f2c40ebdcb093e324ed3d787609e781d4a33af58a066a9a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x135B1 6280 bytes
font_04_sfnt_off0001451c.bin
dd7ede998ff6cb661a61731ca737cf40ecb33c3855c44c1a57517dc4376fa0be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1451C 19336 bytes
font_05_sfnt_off00017d42.bin
cc4c4ec8ef66948cd3398a61336ca181b0064ec2239a21c36315eb1cf1e4a431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17D42 16516 bytes

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