Malicious PDF — malware analysis report

Static analysis result for SHA-256 590aea6ebb9aee5c…

MALICIOUS

PDF

80.5 KB Created: 2021-06-02 13:45:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d9cbdd9bc67db942d11300f4624905f SHA-1: a6149c22aa272a6aa5ff2198f14c0080e9cb38ce SHA-256: 590aea6ebb9aee5c51ce6288ccaa304a2a1c60e0e49492ed80ce2895a5f28d24
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, dugedepap.ru. While no scripts were explicitly extracted, the presence of an embedded URL in a malicious PDF strongly suggests an attempt to redirect the user to a malicious site for phishing or further payload delivery.

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://dugedepap.ru/123?utm_term=allstar+performance+aluminum+radiator
    • https://cdn-cms.f-static.net/uploads/4464529/normal_6031ec111cacc.pdf
    • https://static.s123-cdn-static.com/uploads/4420592/normal_6006465bbcd32.pdf
    • https://cdn-cms.f-static.net/uploads/4384821/normal_601cc22e61e47.pdf
    • https://static.s123-cdn-static.com/uploads/4501774/normal_5ff7f136d1586.pdf
    • https://static.s123-cdn-static.com/uploads/4461523/normal_600785834a363.pdf
    • https://cdn-cms.f-static.net/uploads/4488332/normal_6047e1e33968f.pdf
    • https://static.s123-cdn-static.com/uploads/4446165/normal_5fca9ed3a3c6e.pdf
    • https://cdn-cms.f-static.net/uploads/4407991/normal_606cb350b9f14.pdf
    • https://cdn-cms.f-static.net/uploads/4455883/normal_6038c894be1a7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7ca17325-4a47-49d8-a24f-73d5ab1089ea/adc-v520ir_default_password.pdf
    • http://mawasuwov.pbworks.com/f/kg_to_pounds_and_ounces_conversion_chart.pdf
    • https://uploads.strikinglycdn.com/files/9dad51b0-68dd-47d7-b1e0-42cdc23908bf/manual_veeder_root_tls_350_portugues.pdf
    • https://uploads.strikinglycdn.com/files/63666e85-2fb5-4cc7-a62a-6aac1a397b48/the_spook_who_sat_by_the_door_based_on_a_true_story.pdf
    • https://uploads.strikinglycdn.com/files/ecdb18a3-2902-4f26-88e1-36f1c2644b79/download_sanam_band_all_mp3_songs.pdf
    • http://pamotekegopa.pbworks.com/f/tubumezexoxaji.pdf
    • https://uploads.strikinglycdn.com/files/aadfb29a-fca2-4e74-afb9-329bc753cb88/vajonagegoxelozatu.pdf
    • http://jebodigezev.pbworks.com/w/file/fetch/144504207/23708470804.pdf
    • http://mulasamesi.pbworks.com/f/90003513426.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6aa.bin
2249677ee4010cc85496028d6ca7cac6f2b633bac6583953fa878f94fb2ede56		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AA 5288 bytes
font_01_sfnt_off0000f894.bin
03d5bd777d25f0f5b1e9373f391aa96895762d06dc1c46d1b47787c8e052892f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF894 11516 bytes
font_02_sfnt_off00011f60.bin
1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F60 16140 bytes

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