Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a23b745d6334eb…

MALICIOUS

PDF

47.3 KB Created: 2021-06-10 22:24:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: afe084b5bfd348b413097ae21e36e554 SHA-1: 15430e1ca12690e95f00595b57c2f5d2b337f727 SHA-256: 72a23b745d6334eb41ad59d0ce1daa3628babd0660ebed6234a4fbf3802f989d
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 0.9769

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 https://netcdn.tw/app/431946152/how-to-get-remotes-roblox-hack-game-hack PDF link annotation
    • https://khavarrooy.com/assets/uploads/pages/files/minecraft-jar-free_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/earn-robux-now_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-hack-apk-35-13_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/robux-best_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://khavarrooy.com/assets/uploads/pages/files/fbchampion_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50C2 25176 bytes
SHA-256: 0ff5041443ae8d1775d83caa7cc925253a579cbf37b259f17d69e90e10ae1308
font_01_sfnt_off00008afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFB 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off000094b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94B2 18708 bytes
SHA-256: d1fb26407dcf5de1e1e321dc3ab81d85e4ee49cdc3e023f97ff5258dfea04a54