Malicious PDF — malware analysis report

Static analysis result for SHA-256 7053fd78f578924f…

MALICIOUS

PDF

77.6 KB Created: 2021-03-14 01:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64e9d6c0cc1333ca97a53e01a6df5363 SHA-1: 2aa29b3cb175a95310559eb392f10d9e5a82126f SHA-256: 7053fd78f578924febc7480a9b4f2bd75c3d02a279536b598302c2507d52616c
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of external URIs and a 'download button' heuristic suggests the document is designed to trick the user into downloading a secondary payload. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically to appear as a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=prayers+to+st+philomena
    • https://cdn.sqhk.co/nobutowug/jhibjeo/sotid.pdf
    • https://kupuluxipopanan.weebly.com/uploads/1/3/3/9/133999353/c2773200134d.pdf
    • http://fonujameritules.getenjoyment.net/45041583428.pdf
    • http://copyright-helps-team.com/the_chicago_manual_of_style_16th_editionbwt6c.pdf
    • https://cdn.sqhk.co/nodezaneripe/Nhjigif/ginixurirojelofusuwuki.pdf
    • http://smallita.space/avatar_cinema_telugu_lo_ing6dnnq.pdf
    • https://fulojexerewo.weebly.com/uploads/1/3/5/3/135345176/tegofitiludusaf.pdf
    • http://kaxiwemusemoj.mypressonline.com/tigijekutawidelowe.pdf
    • http://bamirajewenexo.medianewsonline.com/resevorejopef.pdf
    • http://rodisawikikofu.medianewsonline.com/what_is_the_remote_code_for_toshiba_tv.pdf
    • https://fesinukovib.weebly.com/uploads/1/3/4/7/134715349/topejew.pdf
    • http://padlamadla.site/281724662357fs9d.pdf
    • http://robot3.site/cauda_equina_deformitys58qb.pdf
    • https://cdn.sqhk.co/nonuripot/ojijgkJ/alan_walker_new_song_with_lyrics.pdf
    • https://cdn.sqhk.co/sunawopi/Ahg0hbr/best_n64_emulator_games_for_android.pdf
    • https://rewekofewu.weebly.com/uploads/1/3/4/6/134654248/dokew.pdf
    • http://istra-backwater.ru/how_much_money_does_a_physiologist_make_a_yeari0xse.pdf
    • https://cdn.sqhk.co/wunokebewoz/hfxLiho/weakest_link._free_trivia_quiz_game_shows.pdf
    • https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/1815490.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pimimozoji.myartsonline.com/donamepokilipuw.pdf
    • http://tanonarimunal.myartsonline.com/41393826065.pdf
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_46b482d342284e5aab3d895ced3b6e75.pdf?index=true
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_cb24adf3cd6f49f891e0f465f40d7e3a.pdf?index=true
    • 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_off0000f3fc.bin
2247b9fe14f4916e814b279f1ddf4bdda17b0210fb8995d21ac48b1cc80c3294		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3FC 5164 bytes
font_01_sfnt_off00010563.bin
b3eee50bd600512e917b2399063c25f9320eb3691e3401689e419e5d6e33e9a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10563 10492 bytes

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