Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4801665bb5e4e1a…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 03:48:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: db1857fb8f8683ae3be2ef20eef577eb SHA-1: 5b7a42cd47c1ea77a315285f65345274380ada41 SHA-256: c4801665bb5e4e1a73a59847d529d29ae2830aca2b274cbe926502f686c3e1e6
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a LOLBin command-execution lure. The file routes users through malicious redirector infrastructure and 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 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • 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 http://netcdn.co/app/431946152/yammy-roblox-hacks-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id//repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-script-executor-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-using-cmd_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-thru-discord_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-today-generator_GM431946152.pdfIn macro / runtime command snippet
    • http://library.apsidoarjo.ac.id//repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robux-hack-online-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/use-cheat-engine-by-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-apocalypse-rising-hack-september-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-download-free-hp_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/infinite-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hacks-for-bit-slicer-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-apoc-hacks_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-10-dollar-roblox-card_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repositoIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD7 21944 bytes
SHA-256: 9fb0cda67c2e95a41497b3e6799179e43c9eceb740f1de18805ccf937d443667
font_01_sfnt_off00005ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFE 19256 bytes
SHA-256: d3ec6dd3729cbe22ecca49fde7f9f074f5d05332bdcdaeddd6b8b52b530e044f

Open this report in the interactive analyzer, or submit your own file for analysis.