Malicious PDF — malware analysis report

Static analysis result for SHA-256 f651ffaeb7ff4b78…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 08:55:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 39a6476c1e4f1ab767754056b9c015a6 SHA-1: 755558480c37b6dd90ad6d16d5a810906bbbc9f4 SHA-256: f651ffaeb7ff4b78b4afdffc228b005320913e4e120808530f52f98a9680dd63
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs suggest a phishing attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirector links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

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/479516143/free-minecraft-addons-game-hack In PDF document text
    • https://doingimc.com/image/data/files/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/roblox-com-hack_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/roblox-shirt-hair-free_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-hack-paintball-on-roblox_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/roblox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-roblox-jailbreak-exploits_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/cheat-roblox-strucid_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-promo-codes-2021-roblox_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://doingimc.com/image/data/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://doingimc.com/image/data/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/microsoft-roblox_GM431946152.pdfIn PDF document text
    • https://doingimc.com/image/data/files/free-coin-master-spins-link_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_off00003030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3030 22356 bytes
SHA-256: c24cf7243dcdf03f2165391ae48ef04a9f8ed13f58051242c431f74dc4323f4e
font_01_sfnt_off000061fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 18172 bytes
SHA-256: f2b502c1f7fdc586459d018faaa780361b03439c740158c4dfbe15d97db793b4

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