Malicious PDF — malware analysis report

Static analysis result for SHA-256 9914e15766338ab2…

MALICIOUS

PDF

51.9 KB Created: 2021-06-03 12:29:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: c97e229227e7b0205c470dc848a69036 SHA-1: 0f793a919c4699e217826ae0cc46db5ec9433deb SHA-256: 9914e15766338ab29fb636a5e94ebe0c8c8c83e7080764aeef33a1c6c2b1ce37
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game-related lures, such as 'Demon Roblox Game Hack'. The embedded URLs suggest a phishing or scam campaign aiming to trick users into downloading further malicious content or visiting fraudulent sites. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9657

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 https://netcdn.online/app/431946152/demon-roblox-game-hack In PDF document text
    • http://oca.undil.tl/repository/coin-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-instantly-2021_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/tiktok-free-view-editor_GM835599320.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005119.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5119 25584 bytes
SHA-256: a8313df7106159714ce7e89f6b34e6fc459008c22a161204a0f0e029f5e27fb7
font_01_sfnt_off00008cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF3 2832 bytes
SHA-256: 78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805
font_02_sfnt_off0000969f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x969F 7272 bytes
SHA-256: f462303657ce1de10d3e7d5ae1fe17c8584116bd5bc216971166de87266da924
font_03_sfnt_off0000a810.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA810 18212 bytes
SHA-256: c9375e33fa218a20af396b21f97d86776c6e3efb35be63d5e3056768a37a53d5

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