Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f5461fb0be48502…

MALICIOUS

PDF

84.9 KB Created: 2021-03-29 19:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 770552e61caf747f7c77f3675637ea15 SHA-1: d0292a8324365685a521a6ea84b92c460bea39d1 SHA-256: 6f5461fb0be48502277b991923912a0c0cf64cc3974de020d6ef4fc6ed4ce55f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to a URL that mimics a search result for a free PDF, suggesting a phishing or malware distribution lure. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of the malicious URI and the overall detection strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/wix?keyword=ugly%2527s+electrical+reference+2015+pdf+free
    • http://copyrightreports.com/306641854550th1m.pdf
    • http://nikecortez.net/hercules_son_of_zeus_full_movie_download8fhbd.pdf
    • http://hotel-engels.ru/47187333177ni5q9.pdf
    • http://uscarinsurance.info/43972319384fgc2a.pdf
    • http://smartycredit.info/black_box_thinking_book_club_questionsjsmk2.pdf
    • http://eurostore.info/24783858905zc7vb.pdf
    • http://gamedv.design/bose_wave_soundtouch_music_system_reviewfxb3g.pdf
    • http://classkaod.ru/how_to_solve_logical_problemsdz4nc.pdf
    • http://topcabinets.xyz/did_the_cast_of_gone_with_the_wind_get_alongxvlz2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/24804e48-3e7d-410a-8587-92282384939a/19805168846.pdf
    • https://s3.amazonaws.com/gudukupir/mean_median_mode_questions_and_answers.pdf
    • https://s3.amazonaws.com/tutapaxi/identifying_appositive_phrases_worksheet.pdf
    • https://s3.amazonaws.com/nelizenejakarug/nra_handloaders_guide.pdf
    • https://uploads.strikinglycdn.com/files/de886098-b248-4d73-92b7-f29ff34937d7/86475721350.pdf
    • https://uploads.strikinglycdn.com/files/b78c4dfe-3beb-4796-8f63-4d0047c30631/muwozaxubise.pdf
    • https://s3.amazonaws.com/serogajugomiji/how_to_use_keurig_k_mini_plus.pdf
    • https://s3.amazonaws.com/posufij/gufogo.pdf
    • https://s3.amazonaws.com/papuja/crossfit_wod_generator_based_on_equipment.pdf
    • https://uploads.strikinglycdn.com/files/515b0dc6-c006-41b8-b0d6-5c6772ac4bd1/d-link_dir-605l_as_bridge.pdf
    • https://uploads.strikinglycdn.com/files/1c5bef5b-3452-467b-8b05-e427657139fe/53267094739.pdf
    • https://s3.amazonaws.com/regufojalojaza/install_windows_management_framework_3.0_server_2012_r2.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_off000107f0.bin
066812e7c7338711d876ffc8e712fb0fc7cc5ae32725741713e5544bc4acb9e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x107F0 5900 bytes
font_01_sfnt_off00011c37.bin
14b741e14a34423a576707c3eaec654708869df2a47ded1696e87bbf99e191d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C37 11860 bytes