Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a51192eab11e495…

MALICIOUS

PDF

77.5 KB Created: 2021-04-05 04:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7021fa3ee3b6b32849b29aa5abddaef2 SHA-1: 4a502a181b6464d0f5f873e12b623d776c8a6f2f SHA-256: 7a51192eab11e4951612b4aeeb698677f875e88cd3965a720ccb3d030de5e3dd
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, suggests a lure related to 'Speedex tractor paint'. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=speedex+tractor+paint
    • http://woxijakuzadajew.getenjoyment.net/98532138199.pdf
    • https://cdn.sqhk.co/riroxale/gfhb4CQ/xovexepidukexazovonov.pdf
    • https://cdn.sqhk.co/wupifufexix/1Lhdsjp/68478584847.pdf
    • http://ralanizu.iblogger.org/do_infrared_heaters_really_work.pdf
    • https://cdn.sqhk.co/jozanafe/ggGiaqn/narnia_3_movie_in_tamilyogi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/f0ff97d3-caa9-4ed3-bab6-e183ad40481d/how_to_assemble_proform_cadence_wlt_treadmill.pdf
    • http://xapowigi.epizy.com/song_of_myself_quotes_explained.pdf
    • http://kibiviridox.epizy.com/93644855226.pdf
    • https://9cfe8934-cc69-4f76-a0d0-2e9849ea4530.filesusr.com/ugd/fd9558_a8d95c11a65d44f88741733157fd2340.pdf?index=true
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_4fe06a17166e41ea9f513939d7d6ee99.pdf?index=true
    • https://bb55feb6-a0c4-48ae-8f72-aea2c45912f8.filesusr.com/ugd/b9801a_a77c8cd403d74a20b75ee8db7e8e5020.pdf?index=true
    • https://96ea5dd8-6962-4d57-b29c-fb233a715e3b.filesusr.com/ugd/ac3463_6b587f39a403461f9170728e0bd95f89.pdf?index=true
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_0bfa5ca1fa764ebc8a07c5f6979a3441.pdf?index=true
    • https://uploads.strikinglycdn.com/files/30dcbc0e-e546-4d57-b097-711ab3b87845/convert_fortnight_to_monthly.pdf
    • https://uploads.strikinglycdn.com/files/3bdec73b-d404-4014-acba-f8462480b0db/wenuri.pdf
    • https://uploads.strikinglycdn.com/files/81ea67a6-7737-4718-b62f-593421fb425d/65998883001.pdf
    • http://gonuwufif.epizy.com/viber_video_messages.pdf
    • https://c1bbde11-5cda-4f7c-8b74-b2fe90b484f5.filesusr.com/ugd/1c8c6c_bf9b548283b340509bcaeb9dc04452a1.pdf?index=true
    • http://wenares.myartsonline.com/aritmetik_dizi_test.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_off0000e444.bin
6caf568570cbf9d7891e66034460dc4260b411f542ba168b9f3fde63a43975a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 4816 bytes
font_01_sfnt_off0000f4aa.bin
776b84b1db4cc507ad5b760dc4f584310c9c4cf4ffe97383ee2036c4093bbf31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AA 11200 bytes
font_02_sfnt_off00011b01.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B01 4324 bytes

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