Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10b737d567e81ae…

MALICIOUS

PDF

79.0 KB Created: 2021-03-11 18:42:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8028530685e8f934005fd98974a5b06c SHA-1: d1b5ffc3c77efb48eefa3b883bcf496696cef18e SHA-256: d10b737d567e81ae212b7e4ce9f7ccb579beebae6892454850fc902c90c6919b
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, masquerading as a PDF editing tool. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to trick users into navigating to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bologen.ru/award?keyword=edit+pdf+rotate+pages+online
    • https://static.s123-cdn-static.com/uploads/4459320/normal_5ff2e1b645981.pdf
    • https://cdn-cms.f-static.net/uploads/4474999/normal_60217b58c7e08.pdf
    • http://creditchecktotal.info/cartoon_network_videos_free5aqhn.pdf
    • https://static.s123-cdn-static.com/uploads/4377379/normal_5ffa41422cf0d.pdf
    • https://cdn-cms.f-static.net/uploads/4501045/normal_603a8ab1ebb25.pdf
    • http://servisvds.ru/monster_battle_robloxf4wfb.pdf
    • http://spain50off.info/minecraft_game_unblocked05pyb.pdf
    • http://digitalliteracyinstitute.com/sel_351_datasheetr5grs.pdf
    • https://static.s123-cdn-static.com/uploads/4383915/normal_6008581bb39b0.pdf
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fd254435c3af.pdf
    • http://kukushpa.fun/what_stores_sell_camp_chef_pellet_grillse38d9.pdf
    • http://vavoferidedodif.66ghz.com/wabafasikilifalojora.pdf
    • https://cdn-cms.f-static.net/uploads/4426269/normal_6033c777bd7c8.pdf
    • http://lovemecompletely.com/clair_de_lune_debussy_piano_sheet_musicxnc2q.pdf
    • http://apparentlyopt.com/69164585883184jn.pdf
    • https://cdn-cms.f-static.net/uploads/4456996/normal_60130b1d1dc81.pdf
    • https://cdn-cms.f-static.net/uploads/4420018/normal_602ee5090075a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wapepot.rf.gd/what_is_the_best_alexa_to_buy_for_music.pdf
    • http://wogakuw.rf.gd/jopudukerot.pdf
    • https://368051e9-4199-40ea-b9a2-dc6e6f83cb3b.filesusr.com/ugd/6260fe_e4bc3ffa083f443597338204d2dd2714.pdf?index=true
    • http://laguvimotu.rf.gd/tejuzukijabetubexijez.pdf
    • https://6cbe2f5c-748b-4bc6-b691-25a968a47885.filesusr.com/ugd/d6b5da_890e409af9a541988c3336f1032164e8.pdf?index=true
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_fd560994587a4e00b88c6222636b8da1.pdf?index=true
    • https://2c5a832e-93c4-4ab0-bef0-969ef348d747.filesusr.com/ugd/cc5daa_b3666fa1ea044a27889b6f3546328aab.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_off0000f9bb.bin
f28edc09513b70a624dbb47e5b8743784816dd825235e94fcb0531486debe818		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BB 5168 bytes
font_01_sfnt_off00010b65.bin
5e63fac10fcff5a0794f7ae4fc448b6f1b8e76143030ec09309d96a9a0101b24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B65 10240 bytes

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