Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f72dc92b686bf5…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 03:09:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f14647b745a31064266c1ae5242db457 SHA-1: 211142a8dd8abdc800a0fc10bb9552ea3a60e0a1 SHA-256: 82f72dc92b686bf5c9a4ed4bcfbde75d0d4100811e30fac5acdcd78bb2e35104
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector URL, which is flagged as malicious and associated with game hack lures. The document body explicitly mentions 'Free Robux Hack Us' and directs users to the malicious URL, indicating a phishing or scam attempt. While no scripts were extracted, the presence of malicious links and the lure suggest a high likelihood of this document being used to deliver further malicious content or lead users to fraudulent sites.

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.tw/app/431946152/free-robux-hack-us-game-hack In PDF document text
    • https://deutsch-study.com/image/data/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/nonsense-diamond-hack-roblox_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/roblox-injector-2021-free_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/admin-hack-roblox-stat-chage_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/cheats-roblox-da-hood_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-get-free-robux-no-hack-or-cheat-2021_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-robux-premium_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-2021-roblox-account_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-robux-december-2021_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-robux-by-bananaman-world_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-hack-into-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-get-btools-and-speed-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/coin-master-free-spins-today-daily-links_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
font_00_sfnt_off0000303b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303B 22400 bytes
SHA-256: 83c66111d0bfd570bb42ea69512de0ade6dc1ee1f11e8c9ceb63aca4b806ae43
font_01_sfnt_off000061cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 18884 bytes
SHA-256: bfc674629a4fdfc233a3c1a19cbee54387e60bd0cdfc4a3107778b42d9fa82d8

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