Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f814ada84cfea6d…

MALICIOUS

PDF

86.7 KB Created: 2021-03-17 06:18:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 70992fb422ccc0a44b92da71e102a1c1 SHA-1: e357d69026f9fa6b2ccb024f88d3868e3df60e9e SHA-256: 2f814ada84cfea6d51df470b257262856197bf55e46d3896f6b67300f45860b5
96 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with the primary one being 'https://leonvi.ru/award?keyword=byomkesh+bakshi+somogro+pdf+download', suggesting a phishing or malware distribution lure. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though partially corrupted, contains text related to book downloads, reinforcing the lure. No scripts were extracted, but the presence of numerous external links points to a downloader or phishing campaign.

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://leonvi.ru/award?keyword=byomkesh+bakshi+somogro+pdf+download
    • http://zabavnyi-slon.ru/tutorials_point_c_programmingcicsf.pdf
    • http://znakomstva18x.site/xakaxesinobikelogebik4zace.pdf
    • http://damodudajipofem.22web.org/71216901303.pdf
    • https://cdn.sqhk.co/jututumogu/1ZhhqNS/33511712580.pdf
    • http://tourist.fish/69583545988wm8fc.pdf
    • http://voicebftyi.com/91344190124vzg2q.pdf
    • http://bio-ita.fun/how_to_make_doughnut_dough_in_a_bread_makeru3sde.pdf
    • https://soxapibojewaw.weebly.com/uploads/1/3/5/3/135345372/6732407.pdf
    • http://rodina38.ru/airlines_manager_tycoon_2020_tips_and_tricks6bu9s.pdf
    • https://sasofisapen.weebly.com/uploads/1/3/4/5/134590640/ca6fa1e1d106.pdf
    • https://senemoribut.weebly.com/uploads/1/3/4/7/134703027/zixowiroxejiz.pdf
    • http://cleanup-sale.site/what_books_are_in_catholic_bible_but_not_protestantdznmp.pdf
    • https://cdn.sqhk.co/firavibaw/ea0QYji/tabepaf.pdf
    • http://ultra0.space/68224336981ucfx.pdf
    • http://hotita.space/defobavivexo8af0e.pdf
    • http://gnoogle.site/what_colors_go_with_olive_green_couchdnk10.pdf
    • http://xewopixomimam.22web.org/atlas_anatomy_3d.pdf
    • http://flowerport.shop/cannon_safes_at_academyudph1.pdf
    • http://repair-monokoles.ru/59459341655mg1vm.pdf
    • http://newowoliso.iblogger.org/70492623226.pdf
    • http://ruszaimclub.ru/tibogupakawipozonobotog9cyu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6eb.bin
847477eb953cb89b7a6d6b72b350457e8bc15f0ca8da29a24f10318786610c6c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EB 5904 bytes
font_01_sfnt_off00010af1.bin
000a80b24fbaee6f460ad5dbf5588445c37e5d3ce5b509e8e85517e351190797
pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF1 8768 bytes
font_02_sfnt_off0001260a.bin
146b7b41dd58b9ee9213e7d9d8374cae6d56ffd2be5a7e2717d2af57f7626d79
pdf-font-stream PDF embedded font (sfnt) at offset 0x1260A 11432 bytes