Malicious PDF — malware analysis report

Static analysis result for SHA-256 89605ca25d5b7b0b…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 00:29:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8beb9dac73d209bdf13e1a49618085a3 SHA-1: 1c80283f889441c759cf184352382437a4687fc0 SHA-256: 89605ca25d5b7b0b48637eacb82d18b355a7b2893b165327b33bdea94cd2a082
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a game hack lure to trick users into visiting a malicious URL. The primary link, http://netcdn.tw/app/1330123889/pubg-uc-vn-game-hack, is identified as a game hack redirector. The document body contains numerous other links to similar game-related cheats and generators, suggesting a campaign to distribute malware through these deceptive lures. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/1330123889/pubg-uc-vn-game-hack PDF link annotation
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-roblox-group-maker_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/robux-hack-alan-walker_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/all-client-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hexus-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/this-server-is-hacked-roblox-id_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-hacking-youtube_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/how-to-hack-high-school-life-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/top-ten-hackers-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/roblox-jailbreak-hack-client-download_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb//repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/auto-clicker-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/speck-elements-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/emotes-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.feb.unila.ac.id/rfeb/repository/hack-that-thing-robux_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
font_00_sfnt_off0000290f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x290F 30464 bytes
SHA-256: ca814026ad10989fc2abd462018004a09f2f10dc4e9e370fe985858e0d4487e3
font_01_sfnt_off0000648f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x648F 18260 bytes
SHA-256: dc4e3219e286ca2b3412dfa4a1d40ce320a7cfce8433dad6ed8c469fe9e4131b

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