Malicious PDF — malware analysis report

Static analysis result for SHA-256 626ed83882476ae0…

MALICIOUS

PDF

80.9 KB Created: 2021-04-02 06:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6419e0ed2b845987e188b90e7e3e41ca SHA-1: d2bacb07c59bb478a6601539095a93b78346c35d SHA-256: 626ed83882476ae034d4bf8197e540c74e3c7e67991491ba9c1b445ad609a0da
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate it's a phishing attempt, and ClamAV detection confirms it's malicious. The document body, though heavily obfuscated, appears to reference a schedule, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/wix?keyword=nashville+predators+practice+schedule+2020
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/wosor.pdf
    • https://cdn.sqhk.co/vizinifum/gcAgfjd/top_music_2020_playlist.pdf
    • https://cdn.sqhk.co/negolura/bggfhcd/mukti_camp_mod_download.pdf
    • https://kovirelumen.weebly.com/uploads/1/3/0/8/130873776/2456716.pdf
    • https://retotanenumu.weebly.com/uploads/1/3/4/0/134017544/3067692.pdf
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/gopikofefewunedu.pdf
    • https://cdn.sqhk.co/tujarazimok/Aukjcgh/retro_worldwide_llc.pdf
    • https://cdn.sqhk.co/xeloxilava/ghfanie/toronto_street_parking_zones.pdf
    • https://cdn.sqhk.co/jerivudofin/1ef7Chd/sukanodusezapo.pdf
    • https://fiwirozubaxezu.weebly.com/uploads/1/3/4/6/134659856/86b5ffe3e152.pdf
    • https://cdn.sqhk.co/wepigosogo/jclifLq/initial_drift_switch_review.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/lekezaru/sidapetajutoxim.pdf
    • https://s3.amazonaws.com/wazagidonux/gepedituzuxomiwawox.pdf
    • https://s3.amazonaws.com/muvojugejoxip/46383029538.pdf
    • https://s3.amazonaws.com/lezopobigeza/pogil_mitosis_worksheet_answers.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_off0000ecb9.bin
a3a81398a43f15b47287f0aa5db9e2fa5f10477410c05b8b1bd28ebbb8cbd128		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECB9 5240 bytes
font_01_sfnt_off0000fea9.bin
9fc41a81400c838c679f7f321de6ff066b7aefe333971807c85342082c193723		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 12832 bytes
font_02_sfnt_off000126d0.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x126D0 4324 bytes

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