Malicious PDF — malware analysis report

Static analysis result for SHA-256 9966ae57f0b25178…

MALICIOUS

PDF

85.9 KB Created: 2021-04-01 23:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fab8ef308313eb3ec321a64ee6ec7e87 SHA-1: 8fa512b1daf4a691f687237d556cb69bdafb57a8 SHA-256: 9966ae57f0b2517814550efd028623f3f50c67424a99d2a1578cff9fd5955cb3
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a LOLBin command-execution lure. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jottigo.ru/123?utm_term=bang+bang+hd+movie+tamil+dubbed PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368742/normal_601be30da3442.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/fgedjiJ/contract_killer_2_mod_apk_offline_revdl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389830/normal_6047566ed773d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393521/normal_5fdf6915d1cc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376126/normal_601de5e762785.pdfIn macro / runtime command snippet
    • https://cdn.sqhk.co/turanexode/jajc0fW/fafelaninezesaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_60658291be45e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_604125619c4bd.pdfIn PDF document text
    • https://cdn.sqhk.co/zapoboveje/ihqPugc/zonufopebotaji.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415537/normal_5fc9901721100.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/Fgii2Vt/gepakipokutagezoxilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploaIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/meludav/zinegukuxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b87926d4-97fb-4a42-8a95-2e575607d9e9/banunaretewebagiwem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97255c24-845b-4b8f-96b6-e961ef1a0436/cisco_linksys_wrt54g2_firmware_upgrade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3989cec1-0781-4411-b66a-6bb95c6c9d9a/how_efficient_are_fujitsu_mini_splits.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22a1a653-a89d-4b5c-bcae-a367c1a567e0/how_to_maintain_s_curl_texturizer.pdfIn PDF document text
    • https://s3.amazonaws.com/vuterijoze/nerunilenitem.pdfIn macro / runtime command snippet
    • https://uploads.strikinglycdn.com/files/d218ea42-17d5-42ec-8206-4dcab748830f/how_to_put_chicco_nextfit_zip_cover_back_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af146773-7bc1-443b-af27-8719bdbe1d12/balancing_chemical_equations_worksheet_answers_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9946cdc8-db11-4e32-880b-87950b05d830/how_much_do_childcare_workers_make.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/killings_andre_dubus.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/pizza_recipes_baking_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c17f25f-5406-47dc-b39c-729a8a3fc2b2/mukirezijubebetasexesaj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 4120 bytes
SHA-256: 0121e1975763ae5f58a86e10b92e1827589bed6958b82f07ba99c2b121c20fcf
font_01_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 5216 bytes
SHA-256: dbd164bf846ab1f6bbf69b3730b69eaba9a0f5dff899ed57dd5659c7e4ed011b
font_02_sfnt_off00010e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E3F 10956 bytes
SHA-256: e6028828f79bff1ea310e6988d27bfa869943b960413da5da66e7dd55c810843
font_03_sfnt_off000133ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133EC 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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