Malicious PDF — malware analysis report

Static analysis result for SHA-256 739af6c5f64678a6…

MALICIOUS

PDF

84.6 KB Created: 2021-06-03 04:26:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d7812709c0e8ee2d242b69b8940cdb7 SHA-1: 94d82b78f12b2f64cc007bc9eac1421931bfda5f SHA-256: 739af6c5f64678a622e167848344e43a4e45f167c2dae0ac6c9f2f39fb6c51aa
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, which is a common phishing tactic.

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://catamma.ru/pbw?utm_term=how+to+reset+a+whirlpool+duet+sport+washer
    • https://cdn-cms.f-static.net/uploads/4417408/normal_6052b65be1a7f.pdf
    • https://cdn-cms.f-static.net/uploads/4474736/normal_6016226384f00.pdf
    • https://cdn-cms.f-static.net/uploads/4470696/normal_5fd63fa21d238.pdf
    • https://static.s123-cdn-static.com/uploads/4475380/normal_60090aad11cfc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/76a165e9-592a-4978-adfc-f3af2e939bfe/what_tv_channel_is_keep_it_country_on.pdf
    • https://uploads.strikinglycdn.com/files/ecf82713-1eb2-4450-b099-51f883587abd/25473894969.pdf
    • https://uploads.strikinglycdn.com/files/0424976b-bade-4752-b84a-914170f33f84/7797448426.pdf
    • https://uploads.strikinglycdn.com/files/852b017b-4a4a-4b34-9434-55b18ad8c648/the_hound_of_the_baskervilles_movie_free_download_in_telugu.pdf
    • http://lexibitite.pbworks.com/f/dakopefelupujopitosiz.pdf
    • https://uploads.strikinglycdn.com/files/bf0a874d-44b4-453d-b3c2-5754ce0a0c54/epson_xp_620_ink_cartridges.pdf
    • https://uploads.strikinglycdn.com/files/44884721-80e2-4455-b877-9bb329a46d3b/internetworking_with_tcp_ip_ktu_notes.pdf
    • http://pugaxigodaka.pbworks.com/f/45018410758.pdf
    • https://uploads.strikinglycdn.com/files/430f74b6-08bf-4317-99c9-fb013eea1ae1/skywalker_trampoline_15_in_stock.pdf
    • http://zolunegoli.pbworks.com/f/gizorofapuwofu.pdf
    • http://garifukedako.pbworks.com/w/file/fetch/144426039/madotowavase.pdf
    • http://gazoridixilu.pbworks.com/f/bus_simulator_vietnam_game_apk_download.pdf
    • https://uploads.strikinglycdn.com/files/303916bf-5d24-44d0-9335-31edaf557c5b/47504148722.pdf
    • https://uploads.strikinglycdn.com/files/16e57b5e-18de-4706-b817-28612b8de335/mewotazaxosevi.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_off00010197.bin
f0322c1c6cd585f7832a3b8277336fa863b25ddc4c2266dcaf64b0f6342789a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10197 4876 bytes
font_01_sfnt_off00011249.bin
71b326cf10d04c5dbdbb685a99963e36ac74869b64d0da24ea8284929f45a400		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11249 10724 bytes
font_02_sfnt_off00013703.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13703 4324 bytes

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