Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2f0980870ad3ae…

MALICIOUS

PDF

33.6 KB Created: 2021-07-03 11:53:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b10cdaea502b2f4001024aec00421021 SHA-1: 54e5c00879f71b662c0e4f960b9d2fe8589925f7 SHA-256: 3f2f0980870ad3ae13db150e0506debb9e225063a0da6ae0f97ac4c10ba6025e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, specifically advertising game hacks and currency. The heuristic firings confirm the malicious redirector and the lure of free generators. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content.

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/ww-robux-game-hack In PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/how-to-use-cheat-engine-pc-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/mcpe-116_GM479516143.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/roblox-t-shirt-images-free-shipping_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/roblox-phantom-forces-hack-2021-script-executor_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/rbxoffers-earn-free-robux_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_off00002f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5A 21544 bytes
SHA-256: f7adb13f06c8d6b0821c21eab27870dd8520f3d077227a2c6df3d7e607fe7557
font_01_sfnt_off00005e93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E93 18912 bytes
SHA-256: d0da06c06563365e25d678163380f8c7fa6b55e71fb2929e51ced219e7911ccc

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