Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4ab4032b88c5d0…

MALICIOUS

PDF

33.5 KB Created: 2021-06-26 03:58:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: faa79b8352c7a1ad9643795c4052be1f SHA-1: 310d92e8d5a002ea691065eb4a742198ae00449d SHA-256: fb4ab4032b88c5d0b5e6240e7bd94c2a6d519f976765e96bcb1db6da8ca1f3ec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary link identified as a malicious redirector. The document body and heuristics indicate a lure related to game hacks and free in-game currency, designed to trick users into visiting these sites. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest a potential for further malicious activity, such as downloading additional payloads.

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/how-to-buy-robux-free-on-roblox-game-hack In PDF document text
    • https://goodtools.tw/upload/files/robux-earner_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-followers-and-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • https://goodtools.tw/upload/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-card-collection-link_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/a-free-game-called-roblox_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/mega-cheat-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://goodtools.tw/upload/files/how-do-you-hack-somebody-on-roblox_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
font_00_sfnt_off00002f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7F 21256 bytes
SHA-256: 46622c9ad81dce603ab566bd076ec58f9eb1bc3cb6e6e80c11cbf1d386bd5fec
font_01_sfnt_off00005da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA4 19132 bytes
SHA-256: 98c2ef7ce9ac5835ecdf84922c8c9066568cc9a8fb05fe820807657408b0b1c0

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