Malicious PDF — malware analysis report

Static analysis result for SHA-256 49441a2dcf550019…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 15:28:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a2ca1b8d613950a61f6791b9c14a4871 SHA-1: ab25b21edc16c7f0c94033c17b9d42cf90127302 SHA-256: 49441a2dcf550019b2981979bba03aa710fb00f2a489bdad5be6d7e68ec13d40
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that promote free game hacks and cheats, specifically targeting Roblox. The presence of an external URI pointing to 'netcdn.tw' suggests an attempt to redirect the user to a download site. While no scripts were explicitly extracted, the ML classifier and heuristic firings strongly indicate malicious intent, likely to deliver a secondary payload or engage in social engineering.

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/roblox-games-for-girls-free-game-hack In PDF document text
    • https://lib.insan-unggul.ac.id/repository/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/fly-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-gift-card-giveawa_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-items-code-on-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-hacker-group_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-free-robux-by-pressing-one-button_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/hacks-como-tener-robux-gratis_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-hacked-twitter_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-games-for-girls-free_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-with-no-serveys_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_off000030d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D5 22568 bytes
SHA-256: 565d0955883c5fa8ee2519ce1b8751113195bf4fe25715a3aa8dbcf94aeeca89
font_01_sfnt_off00006360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6360 19032 bytes
SHA-256: aee2a28299beed10c926f6c40fa17229eb7e5ec1ce66db8d5ea483222f8a9257

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