Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46ddcb57451ebb8…

MALICIOUS

PDF

80.5 KB Created: 2021-03-10 03:05:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5ba53b987848b9d929ffe1a91c0a836 SHA-1: 7cc67d2a6e465133230d281aa2e397afb2b4a4ee SHA-256: f46ddcb57451ebb86b457286a896ff3b982df4fbda1d1b95629687c37080b464
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. ClamAV and ML classifiers flagged this PDF as malicious, indicating a high probability of malicious intent. The document body, though heavily obfuscated, appears to be related to the URL's keyword, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/award?keyword=aprender+portugues+brasile%25C3%25B1o+pdf
    • https://cdn.sqhk.co/nakunadubux/ctEiae2/37485178355.pdf
    • https://cdn.sqhk.co/muxaferamet/9ieSKha/morowamaji.pdf
    • https://cdn.sqhk.co/suzeboxiwo/iiasXgg/14411166582.pdf
    • http://vzruvayarttraff.xyz/vokaxubt40km.pdf
    • https://cdn.sqhk.co/bopesajan/biiWjfa/dejijonuvudizenam.pdf
    • https://cdn.sqhk.co/nufanusiki/Xjhgfid/20137169705.pdf
    • https://cdn.sqhk.co/bijukipuj/opiam4m/takeout_restaurants_open_near_me_drive_thru.pdf
    • https://cdn.sqhk.co/lopokevofoti/gjcKhaN/dj_mix_name_maker_online.pdf
    • http://alsamcctv.com/lista_de_los_androides_de_dragon_ballkefls.pdf
    • https://cdn.sqhk.co/vazoguzo/NMjctHe/jixarevomibebumanizize.pdf
    • http://goladelexugezi.sportsontheweb.net/fuxiviku.pdf
    • https://cdn.sqhk.co/xupumekejaxa/hjieghy/vajisosejepufijod.pdf
    • https://cdn.sqhk.co/sipobufiw/9gighQG/79125651536.pdf
    • https://cdn.sqhk.co/wituruxa/jidvgct/soda_dungeon_2_arena_guide.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://lusajafimaneru.myartsonline.com/tefofupu.pdf
    • http://saboveliga.myartsonline.com/boss_ve_20_vocal_harmonizer.pdf
    • https://uploads.strikinglycdn.com/files/3193c4e1-ce9a-457b-bfe8-d32bf3b9f5a8/32042096473.pdf
    • http://bufijonewufo.onlinewebshop.net/60032417022.pdf
    • https://uploads.strikinglycdn.com/files/62d2d938-f41c-4cfa-9122-5ea17dd28b0d/pasinaje.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_off0000ec3d.bin
9bf3886bcccf06ba56f7d5ad692a761a26919d0a97efce1fa92df9ac25a1373a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3D 5432 bytes
font_01_sfnt_off0000fe79.bin
3a2cee73aebefdac6045d518904b0c752e084efc697e996f4367667c3b758555
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE79 11748 bytes
font_02_sfnt_off00012471.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x12471 4324 bytes