Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3792619f0d11623…

MALICIOUS

PDF

101.3 KB Created: 2021-03-12 10:34:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7839e536173a754c718f22a7f4a1e9a1 SHA-1: 73e939fd4621e8b0078b06644727afd48020b6f0 SHA-256: c3792619f0d11623604ac8f5cd691c19e2ef42591d651c1428e8c6ecf88d2224
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating external URI usage and is flagged by a machine learning classifier as malicious. The ClamAV detection confirms it as a phishing trojan. The embedded URLs suggest a phishing attempt, likely to deliver a second-stage payload or redirect to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://bologen.ru/award?keyword=orchitis+treatment+pdf
    • http://vanimerukaguto.scienceontheweb.net/72540245522.pdf
    • http://kigumelez.medianewsonline.com/netgear_gs108e_switch_manual.pdf
    • http://limevekobo.iblogger.org/zasaw.pdf
    • http://lenugaguv.medianewsonline.com/exercices_accents_francais.pdf
    • https://cdn.sqhk.co/sugezigo/ajfggjd/pimibax.pdf
    • http://xexogafuko.22web.org/11020700537.pdf
    • https://cdn.sqhk.co/rabawula/35Mhg40/zombie_catchers_hack_unlimited_everything.pdf
    • http://punejew.mygamesonline.org/what_are_good_core_exercises_for_seniors.pdf
    • http://jikusofare.mywebcommunity.org/does_robinhood_allow_swing_trading.pdf
    • https://cdn.sqhk.co/tezizejaropu/bjfmpyH/coag_quarterly_report_ndis.pdf
    • http://tiwujatujoput.mygamesonline.org/excel_formula_multiply_multiple_cells.pdf
    • http://vizilirudigub.getenjoyment.net/disposal_of_hazardous_waste.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_5faeb1fc40124706a35ddae3b1f262f9.pdf?index=true
    • https://uploads.strikinglycdn.com/files/72169d4a-e875-4d9c-86ba-1d195bb3d9c6/31090236225.pdf
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_08cf6772a7034171ac87fbbe5958148d.pdf?index=true
    • https://7095e710-59ac-4d27-8a5a-f3bbcaf65deb.filesusr.com/ugd/418e76_61baa623be084b8d8a0a3c602345f0f0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/716b4470-348e-4ed0-b8c6-3bcb2dd2ea8c/62700705664.pdf
    • https://0fc0baf9-b884-4fcd-968e-f93c0f938930.filesusr.com/ugd/68ec51_86acb07af2a74823ae49e8cd19c9324c.pdf?index=true
    • http://luvetux.myartsonline.com/xupemetidazis.pdf
    • https://uploads.strikinglycdn.com/files/48661e44-2768-42bf-ba03-b738a47cb9c6/transcendental_meditation_course_melbourne.pdf
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_f27f0ff9c70947948548e148843037bb.pdf?index=true
    • http://zodejudefafu.epizy.com/sukateta.pdf
    • http://xuwuxubemepimox.rf.gd/a_tamil_video_song.pdf
    • http://poxarow.epizy.com/somusuxufukemaduvum.pdf
    • https://uploads.strikinglycdn.com/files/7d533dd6-2bff-4584-ab10-91cfa889d7ab/vekogef.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_off00015010.bin
2ed12d2ca39f902c3cf966db52cc53389676d49cfa176eebea3861e54e7675dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15010 5388 bytes
font_01_sfnt_off00016238.bin
92ce7d266b666be044cca0ee2a40b6b606470df56ad95ade6eaa108faf8e72ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16238 11028 bytes

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