Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5ec733c41b00dc3…

MALICIOUS

PDF

81.8 KB Created: 2021-05-06 01:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: eecbff0e3e961cbf909206a3d881f9c9 SHA-1: 2dd37ef27b2f16715af70de2cf5846e4517b9ec1 SHA-256: f5ec733c41b00dc359c9a1e27311e1636a4c563850ac037464d3a4617f2161e8
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, contains text related to 'unemployment class 9', suggesting a lure to a phishing or scam page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/strik?utm_term=what+is+unemployment+class+9 PDF link annotation
    • https://cdn.sqhk.co/zolilogifuxe/jOC9hg3/xojoxegede.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/TfAFjb8/97573085640.pdfIn PDF document text
    • https://cdn.sqhk.co/luwesefizi/jjrElgc/tuwazusoke.pdfIn PDF document text
    • https://cdn.sqhk.co/todipageb/gcgxxia/cbc_educao_fsica_anos_finais.pdfIn PDF document text
    • https://cdn.sqhk.co/gijesali/L1ihwgf/zaxikemetemi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bokofapig/momentane_nderungsrate_ohne_formel.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/star_ocean_anamnesis_apkpure_english.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/18069718623.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/the_official_overstreet_comic_book_grading_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5da66e08-9025-4e78-b0e5-c5c1eb7c6ca5/gapofevije.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/269b23ba-98e2-4695-b88e-6cbf00dd86b2/safety_1st_alpha_omega_elite_sophomore_car_seat_installation_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/923fdb39-f53c-4679-8a5e-19d6b3f8b404/timawusedefunuvotilaliz.pdfIn PDF document text
    • http://gisipusizen.rf.gd/crash_bandicoot_warped_100_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c851d4d9-2999-4782-946c-b840fda10324/lenovo_g50-80_cd_drive_size.pdfIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/tikifanu.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/black_butler_lacrimosa_flute_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14edd932-8320-4585-a335-7bc40333c5d8/ernest_hemingway_a_biography.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/burris_eliminator_2_review.pdfIn PDF document text
    • http://sugunatofebu.rf.gd/functional_behavior_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/netgear_wnr2000v2_as_access_point.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0ea76f7-4b3e-48ed-8d82-009c9a3c4a36/crossfit_workouts_with_running_in_them.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/70863215757.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AB 5348 bytes
SHA-256: f6a5ccabddf7ac346c4150391e8527a78ab49487b02b1db89fe11814383cfd5f
font_01_sfnt_off000112c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112C8 11900 bytes
SHA-256: a8defb969e922a09e1da0acd4d2c94ae8c7e7f56237a2583e3bb691ba0a6e0fd

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