Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5e5d2ce9dda922d…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 04:41:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b28f59e1c56240512ee149d786858d3c SHA-1: ebecbd81399bba1067a1f3321878fd1fadc45545 SHA-256: f5e5d2ce9dda922dc9d0fd52852d53d0fe2b9bcfc6871d7c7ecc7972b155c1c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and related lures. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple redirector links indicates a clear intent to lead the user to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs are sufficient to infer a malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/hack-download-mega-innovation-roblox-game-hack In PDF document text
    • https://foc.vn/public/upload/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-multiplayer-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/raspberry-roblox-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/pubg-uc-and-generator_GM1330123889.pdfIn PDF document text
    • https://foc.vn/public/upload/files/snippet-hack-roblox_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/reddit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/wizard-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/radio-cheat-roblox-skript_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/roblox-no-damage-hacks_GM431946152.pdfIn PDF document text
    • https://foc.vn/public/upload/files/wurst-hacks_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://foc.vn/public/upload/files/tiktok-views-free_GM835599320.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
font_00_sfnt_off000030c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C8 22220 bytes
SHA-256: 48b0508fb2ae988e5467430409624f8a1523d907538ec0e655885897a0109431
font_01_sfnt_off0000621c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 19696 bytes
SHA-256: f529cfce64ebbd5a6abb86d3750508c412b82223e3be50e9ff676d35d0628920