Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a82a24cc2e0a25…

MALICIOUS

PDF

79.7 KB Created: 2021-03-23 21:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3212006d1bac08f30e3ee80000e258e7 SHA-1: 3a84982718db42b820f3a7d1c9f1cd0dc16b457e SHA-256: f1a82a24cc2e0a254f018e232ec1d984a8ba787d2bd6c77446a76fe42462d909
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a malicious payload or phishing page. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a harmful site.

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://mezovuduw.ru/123?utm_term=bengali+movie+bandhan+all+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411270/normal_604054369eb5d.pdfIn PDF document text
    • https://cdn.sqhk.co/lukejisuvawe/igshg5x/fatisemomavezovivuvex.pdfIn PDF document text
    • http://zinuvudoliku.iblogger.org/larururijevevomexukerom.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/ihbihge/monster_trucks_near_me_2021.pdfIn PDF document text
    • https://cdn.sqhk.co/nivunufozub/hPgiidM/download_bubble_shooter_ilyon_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sunalikefazo/0zjyUja/nbc_sports_network_premier_league_schedule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479451/normal_6044665a19e6f.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/hibhjNq/overdrive_premium_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420476/normal_6016cb058f37a.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/vjdbthf/66745373285.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zopenave/dbms_sqltune._report_tuning_task_no_output.pdfIn PDF document text
    • http://nuvotadaxiti.epizy.com/40144890532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b210cb4b-1f4e-430e-a5af-f8099154cefd/how_can_i_learn_photoshop_quickly.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/57191830727.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/oster_a5_clipper_repair_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/70856204296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/099cce5a-d745-4680-a4e6-ebd6f2e37302/how_many_tribes_in_native_american.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49c3a04-d13f-431b-9087-2dd2b92c830e/6668199030.pdfIn PDF document text
    • http://daluzijirajof.rf.gd/77639924852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a75f1df-4b0e-4516-ba85-6041c0b39b00/how_to_know_if_your_baby_has_developmental_delays.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF899 5392 bytes
SHA-256: fad84f81b4f8f430d6b84d3455c5df026ff38499ce789cce4693bdab566efdf5
font_01_sfnt_off00010ad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD2 11512 bytes
SHA-256: 507dcea982584f98b9adf70ee5a6ac215e52a1eb7ac5406215f4ff2c88165909

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