Malicious PDF — malware analysis report

Static analysis result for SHA-256 22839e6879608879…

MALICIOUS

PDF

32.3 KB Created: 2021-07-08 07:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: f74d003609ecc9af143d33f6c7cd812e SHA-1: 2b3d6f9b135cce09d37256db10dcebd82726337d SHA-256: 22839e68796088794cc1f8fe2bfb3d473887ac5098944111a3671c16235eab06
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically targeting users interested in game hacks and free currency for games like Roblox and Coin Master. The heuristic firings confirm these links point to known malicious redirectors and lures for game-related scams. While no scripts were explicitly extracted, the nature of the embedded links suggests a potential for further malicious actions such as downloading additional payloads or phishing for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/how-to-get-free-robux-com-game-hack In PDF document text
    • http://ghi.dk/billeder/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-robux-hack-no-download-2021_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://ghi.dk/billeder/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/buying-rich-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-use-hacks-on-roblox-no-virus_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-yt_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/hack-all-tycoon-roblox_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/april-1st-roblox-hack-face_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://ghi.dk/billeder/how-to-hack-assassin-boxes-roblox_GM431946152.pdfIn PDF document text
    • http://ghi.dk/billeder/coin-master-hack-spins-free_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_off00002901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2901 21836 bytes
SHA-256: 0a977af43ed12e95fa49e7f9614c21a352be3c8a5e7bbd3326afc6af0cec4a9e
font_01_sfnt_off000058fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58FE 19244 bytes
SHA-256: 2a82a6b4e88d45175d2fe2eaf287537d274cffbbed35dd56f8b6e767c09dfc54

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