Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9d049ffc0e515d7…

MALICIOUS

PDF

37.5 KB Created: 2021-07-05 16:56:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 204e3ce1c1663844df58615aae2087a6 SHA-1: d961e59e2f3387a9912f397515eaea24a5d8cfaa SHA-256: a9d049ffc0e515d78e5669217ec6050f9bedb66a0cdbf0c79413dcce64c72d2f
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 0.9981

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/hack-coin-master-game-apk-download-game-hack PDF link annotation
    • http://pustaka.smpmuh2yk.sch.id/repository/emoji-puppy-tshit-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/cheat-engine-64-roblox-windows-8_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/pop-slots-free-vegas-casino-slot-machine-game-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-hack-roblox-weight-lifting-sim_GM431946152.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id//repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://pustaka.smpmuh2yk.sch.id/repository/how-to-get-free-coins-in-mcpe-master_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
stream_002_off00003836.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3836 23704 bytes
SHA-256: c1550268e963f3861dfec869c5f22001413c2e4dad703a45c18d7a20c7305a07
font_01_sfnt_off00006df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF4 19020 bytes
SHA-256: 44af2786720a0a2ae12260f8c83a457bff635c12deb4555913cd7afcce07352d

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