Malicious PDF — malware analysis report

Static analysis result for SHA-256 83720f09d9563c85…

MALICIOUS

PDF

47.7 KB Created: 2021-06-03 11:16:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a7cfcdd820ac86a8eab819a88c7b1f95 SHA-1: fb95f2156d28004ce99dc4206650e2995a9e4274 SHA-256: 83720f09d9563c855ea432b150ebae904d4f361a8ec771b88763adb13b206e2a
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.online/app/431946152/real-free-robux-generator-game-hack PDF link annotation
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-raid-hack_GM406889139.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/optifine-pe_GM479516143.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-followers-on-tiktok-no-verification_GM835599320.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-2021-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://www.polresbadung.id/new/public/ckfinder/userfiles/files/roblox-verification_GM431946152.pdfIn PDF document text
    • https://www.bandicam.comIn 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_off0000516d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516D 25568 bytes
SHA-256: 815d21d3a4eaaa151e37d0f72269b5c82151becd4c1344296c89ffa00fdff52b
font_01_sfnt_off00008c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C74 3112 bytes
SHA-256: 471f662098e83c5562504503f5e7603b336ca0957605358090bb98e15c7aed80
font_02_sfnt_off0000972e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x972E 18420 bytes
SHA-256: 14d46e1fdea56b33fc0f11521403768098913a132f51569f9b7a46a3ad47c201

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