Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd34bc72dc339dd7…

MALICIOUS

PDF

44.1 KB Created: 2021-05-17 09:02:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cc95880c5d73e231f65f4d6aecd1f447 SHA-1: 10c1f7b720ec9681e1d1dd62c1a77bb95275228b SHA-256: fd34bc72dc339dd7ca563de7c6c98ae96d9067d68e799d6c167b9f531af89544
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 0.9976

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/coin-master-free-spins-only-game-hack PDF link annotation
    • https://infocorrosion.com/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://infocorrosion.com/images/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://infocorrosion.com/images/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://infocorrosion.com/images/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://infocorrosion.com/images/roblox-toy-codes-free_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_off00004937.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4937 29376 bytes
SHA-256: dc9994ff8cfe21f267db9fbca8e730cb259746806d72a538fb0c8e286bebf8d1
font_01_sfnt_off00008acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACB 18140 bytes
SHA-256: e8323280cfa25f0840c1e0ad6f99419943ef2c7379aa1851e8b4a739432d5c3e

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