Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fa81f5cc3e7247…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 10:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ec8f4225a3a2d3e7e6b5bf77d7f77aad SHA-1: 7c6152082b9d70b84f8ddb07c835ae848e117183 SHA-256: 94fa81f5cc3e72475eae3ea7a42a7c2a102111f6941f03ea1bc26f8022ad07f4
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/431946152/free-robux-without-any-verification-game-hack PDF link annotation
    • http://library.stikessuakainsan.ac.id/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/getrobux-ninja_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-weird_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-hack-a-minecraft-server-and-make-yourself-op_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/real-free-robux-hack-to-buy-anything-kindle_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-roblox-glasses_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-dark-egg-on-raise-a-dragon-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-hack-hand-grabbing-players_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/hacks-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/free-robux-via-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/roblox-robux-hack-com_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/best-clicker-games-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id/repository/how-to-hack-weight-lifting-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://library.stikessuakainsan.ac.id//repository/free-spin-coin-master-game_GM406889139.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
font_00_sfnt_off0000329c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x329C 22192 bytes
SHA-256: 6cfd9dcf0cd77e11f339a846e15469222960b17c7c9bdb019e3ccbe73cb00378
font_01_sfnt_off00006368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 19620 bytes
SHA-256: 98e25ba6f0db8882549c0e371305563de57acb07d7fce2330b7496bf897a2717

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