Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc306382776e0aa…

MALICIOUS

PDF

82.6 KB Created: 2021-03-12 06:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e0e999a5a8d5f256bb48f85b8b15849 SHA-1: 4ac7e9d5c9dc7388cac9225faa0a2b081271dab0 SHA-256: bcc306382776e0aa1b59088512d5bb523468c1045c9e19bbc2d768b75c48d98a
104 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and a heuristic firing for PDF_URI indicates an external URI was found. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of a 'Download button' heuristic further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/123?utm_term=parquet+file+sample
    • https://cdn.sqhk.co/medujebukoma/eoiewp2/54113772044.pdf
    • https://cdn.sqhk.co/gukitane/Bghus0K/pidogatumubetitisexa.pdf
    • http://winoxolupuvil.getenjoyment.net/kotter_j._2012._leading_change.pdf
    • http://tapidiv.medianewsonline.com/lalajekuzuxogidujev.pdf
    • https://cdn.sqhk.co/denirinodo/gjheBjg/how_to_switch_off_roaming_on_iphone_xr.pdf
    • https://cdn.sqhk.co/jawubibegeba/gdwHJje/light_meter_app_for_iphone_4.pdf
    • https://cdn.sqhk.co/sifalavuxozo/7Djd1BN/bakivimu.pdf
    • https://cdn-cms.f-static.net/uploads/4448992/normal_6046d5bc2db47.pdf
    • https://cdn.sqhk.co/forokuxodel/RVhX5GM/mahjong_solitaire_classic_free_download.pdf
    • https://cdn.sqhk.co/liripudeb/zbgg7pg/dofefimitifaxefulu.pdf
    • http://siviveko.getenjoyment.net/80691973569.pdf
    • https://cdn.sqhk.co/kajipazuto/bhg1jao/balloon_arches_prices.pdf
    • https://cdn.sqhk.co/lojadisexudo/thjgiij/monument_valley_hotels_pet_friendly.pdf
    • https://cdn-cms.f-static.net/uploads/4366995/normal_60242878bbf86.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vuxagixil/arashi_5x20_pv.pdf
    • https://s3.amazonaws.com/benubapopikaj/iphigenia_2._0.pdf
    • https://uploads.strikinglycdn.com/files/ef39142a-a271-47c3-ad05-3f0e32859c3d/sharepoint_designer_2013_sp2_download.pdf
    • http://pimobepetokonud.myartsonline.com/ed_sheeran_castle_on_the_hill_chords_easy.pdf
    • http://nukilaba.myartsonline.com/anestesia_geral_livro.pdf
    • https://s3.amazonaws.com/veraxawewib/bacteria_definition.pdf
    • https://uploads.strikinglycdn.com/files/66df64ea-73e4-40f2-befe-66f0dfa13bbe/how_to_write_an_explanatory_essay_ppt.pdf
    • https://s3.amazonaws.com/geraromu/fizefevabemusimibizabije.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_off0000f30f.bin
fed8c36fd6aed4e904022dce3c4e5a46a444cb3df404718627765ab592ac61bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF30F 4556 bytes
font_01_sfnt_off0001032b.bin
e2766e65e1e15578aefe26a7591e61805d4a66d3c5024782dfb83ee90dd3a7f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032B 5176 bytes
font_02_sfnt_off000114b3.bin
0eb267f423f054b724a6353057c7ef8b02557e783f192ef9ba9eb94d6b5a5003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114B3 11656 bytes

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