Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fc122410eb2fa05…

MALICIOUS

PDF

37.7 KB Created: 2021-07-05 09:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dd32ccb2bf612d843a2604082ed046e2 SHA-1: 3c961948cad448a20a637cd479f85c4dfff49b44 SHA-256: 9fc122410eb2fa05f4f4e71d7a14d8e2f37bf5b03ba946f443a07aed8d62aac4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9886

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/free-coin-master-androd-cheats-2021-game-hack PDF link annotation
    • http://library.darmaagung.ac.id//repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/how-to-get-the-kistune-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/wwwcheatsgurucom-pc-roblox-cheats-codes_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/como-tener-wall-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/is-it-possbile-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-daily-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/roblox-admin-hack-55-download_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/roblox-money-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/hack-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/bux-land-free-robux_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/how-to-get-free-robux-no-sign-in_GM431946152.pdfIn PDF document text
    • http://library.darmaagung.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://library.darmaagung.ac.id//repository/javascript-free-robux_GM431946152.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_002_off000031b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31B6 22848 bytes
SHA-256: 19d30d24de63fb8c59b04656901351061fea5bb55604a6057ea7a760f2b0de12
font_01_sfnt_off00006526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6526 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0B 18740 bytes
SHA-256: b5d5fab3075ecaef24d3e7ef80161a8b3919e15e91a18b6deabf6d479e1deee7

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