Malicious PDF — malware analysis report

Static analysis result for SHA-256 65db22f4d2013dc5…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 01:14:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9dbc3a1500a85b4d354d061d31ac12e5 SHA-1: 3c431df9743ade06135a8e0faaa1fb69e0fd8a2c SHA-256: 65db22f4d2013dc549b49254cf4852dd2463f0f48c5484cfef52f620755a3ef6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a high-confidence heuristic identifying a lure for 'free generator / game hack'. The primary URL, http://netcdn.tw/app/406889139/coin-master-daily-free-spins-game-hack, is directly linked to the lure. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware delivery.

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-daily-free-spins-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7//repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/robux-pin-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/can-you-actually-hack-roblox-for-rubox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-cheat-supercheats_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/hack-on-roblox-of-how-to-walk-through-walls_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-fly-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/your-bizzare-adventure-script-esp-free-2021-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_off0000336f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x336F 23628 bytes
SHA-256: 7c22c60ee0d6b01156db65ab73c56abf02f01f24bdc972d2b67ab9d25b18615a
font_01_sfnt_off000068db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68DB 18596 bytes
SHA-256: d4477381221bf12ecca5ad3e1f3dc1fc74afabeab8ec0ad27ac375f28b3d2402

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