Malicious PDF — malware analysis report

Static analysis result for SHA-256 598f36e6db5cac29…

MALICIOUS

PDF

42.6 KB Created: 2021-05-16 11:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 23fa3f2dcd63196e8ce6356a4d4e5e9b SHA-1: 6af4764743c35cad00b0265cd23ecfa0767f4297 SHA-256: 598f36e6db5cac2984245a9d2a87b24cb333fb1038af18e8f0256eafc27a013e
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 0.9971

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.xyz/app/406889139/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack-game-hack PDF link annotation
    • https://au-ma.com/image/data/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/20-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/robuxmatchcon_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/static-moonactive_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/apps-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/is-it-possible-to-get-free-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
stream_003_off0000498e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498E 24968 bytes
SHA-256: 87b8fa503c7850bcc4a16c6d6bc569b6ed4d07afe91ffdb4068896883453b1df
font_01_sfnt_off00008222.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8222 18908 bytes
SHA-256: 22eea22e93e3a2ab8e7a2e6bfe46b3c4bbbdffc0ed3854b3ba75aeac54633c45

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