Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b435ace0473f9da…

MALICIOUS

PDF

76.3 KB Created: 2021-04-06 16:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64d51d1b73f9e25b4afbce5c946f94db SHA-1: 51c97ac350481d2a1d020f27a02854e739d66552 SHA-256: 6b435ace0473f9da4ff34b1e0e8d829ea1c89aa40be6bf155768e042b49ed4ba
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that is flagged as malicious by heuristics and ClamAV. The document body, though heavily obfuscated, appears to be a lure related to appliance repair, suggesting a phishing or social engineering attempt. The presence of an external URI and the ML classifier's high confidence indicate a malicious intent to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://ponafet.ru/strik?utm_term=what+causes+a+front+load+washer+not+to+drain
    • http://imedo.ru/android_oreo_version_freecwgz4.pdf
    • https://cdn.sqhk.co/tajixixejafi/ahdhiji/lefopivamitu.pdf
    • https://cdn.sqhk.co/jidelugob/hauKhcQ/94829552959.pdf
    • https://kowalarezanir.weebly.com/uploads/1/3/1/4/131438161/98ac71f5a8e9df8.pdf
    • http://xozonline.ru/791874055589imd8.pdf
    • https://cdn.sqhk.co/kakolutezegu/ieoqjia/section_149_corporate_law_reporter.pdf
    • https://noragunefide.weebly.com/uploads/1/3/1/6/131637841/tuzuwifavaluvezo.pdf
    • http://trokot-newshop.online/dfi_augered_cast-_in-_place_piles_manualsbg4h.pdf
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/bunexasu_xipaxoxevi_bimulumew.pdf
    • http://mon-cmbretagne.best/437432844702azf5.pdf
    • http://ighelpcenter.xyz/grammar_practice_worksheets_for_class_8hdnjx.pdf
    • https://wixumiwob.weebly.com/uploads/1/3/0/7/130776296/10aff.pdf
    • https://cdn.sqhk.co/zewezerezi/dvRiejf/89236963578.pdf
    • https://wazefiwef.weebly.com/uploads/1/3/4/3/134369298/cb3a75891.pdf
    • https://cdn.sqhk.co/wenudiwome/jdja0ig/small_rc_glider_plane.pdf
    • https://cdn.sqhk.co/jowapezo/IjxjdSl/mod_gta_san_andreas_android_naruto.pdf
    • https://cdn.sqhk.co/jomuzetaveni/bGiidie/xovajoxirifi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7c25add7-abbe-44b6-a24c-c0d8c1925a5e/notaborogiwimanop.pdf
    • https://uploads.strikinglycdn.com/files/a2b6ab6f-72fd-4118-a30c-f22b38783664/southern_baptist_seminary_presidents_nix_critical_race_theory.pdf
    • https://uploads.strikinglycdn.com/files/f0fc2495-8777-4795-bba2-15c4a419a5e1/what_is_the_trichromatic_theory_of_color.pdf
    • https://uploads.strikinglycdn.com/files/6932d317-a93a-4a6c-a3d7-08ed9849f5f9/how_to_disconnect_ue_boom.pdf
    • https://uploads.strikinglycdn.com/files/47f1bd65-10f5-4e8c-86b1-7bc7d17ad219/35450046267.pdf
    • https://uploads.strikinglycdn.com/files/3ce84e70-b303-45e4-a1a4-48d7a4ac3715/vocabulary_workshop_level_blue_teacher_edition.pdf
    • https://uploads.strikinglycdn.com/files/d652f26f-d8a7-4ca4-b08a-0eaf496e1432/ordering_your_private_world_study_guide.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9c5.bin
be6ed1c8060cff67481c32f1624be5cfd734f43b310354058c8f23524f840121		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C5 5212 bytes
font_01_sfnt_off0000fb91.bin
76ed6557dd45a82369140cc074a8606904a38e3c91875ba4feff57071ef2750f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB91 12472 bytes

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