Malicious PDF — malware analysis report

Static analysis result for SHA-256 164d373401a43335…

MALICIOUS

PDF

36.8 KB Created: 2021-07-05 21:14:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1bd42cd0a4df52bf54d780f9cab28cac SHA-1: d4225a9f69a83997c1ea836e9d132b834a34f65b SHA-256: 164d373401a433355021a14976d233f5091ced8ed55de89f5d8ca6b5bc694dc1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 4

  • 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.
  • 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.tw/app/406889139/coin-master-heaven-free-spins-today-game-hack PDF link annotation
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-hack-any-game-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-cheats-free_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-add-mods-to-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-that-works-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-do-u-hack-into-bases-on-sharpshooter-roblox_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-shirts-images_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/if-everything-was-free-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/knife-hack-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/hacker-hair-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-hack-in-roblox-comm_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/moon-tycoon-roblox-gives-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000379d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x379D 23396 bytes
SHA-256: 79822629ab76956b159add7eb176a98d9a7378bbfacf051c6da464c0c55de3f7
font_01_sfnt_off00006c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C2E 18640 bytes
SHA-256: 3d9153b17c01349321dbf9895197e00a389ef43fe3f4ac06fe2a253dcac379fc

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