Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b588f6ec1c108a…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 11:39:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cd3dd1d2fa3d7ea7921a8a271dcca8f4 SHA-1: 7a0e2fc83ebd5ab94676ad7324dfecf8fb72ec22 SHA-256: f5b588f6ec1c108a9ed9acac81cf87ee080f37fbea8e6b62f9ace91a1f398754
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, promising free game hacks and items. The document body and heuristics indicate a lure for game-related exploits, likely to redirect users to malicious infrastructure. No scripts were extracted, but the embedded URLs and the nature of the lure suggest a phishing or scam attempt.

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/479516143/free-minecraft-windows-10-account-game-hack In PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/best-free-software-to-make-thumbnails-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-btools-and-speed-hack-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/can-you-get-roblox-on-switch-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/20210-robux-code-for-free_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-free-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/lots-of-robux_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/free-roblox-shirt-in-game_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/roblox-download-free-for-windows-10_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/e-free-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://katalog.stikesmukla.ac.id/repository/coin-master-free-gifts_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_off000032ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32FF 22596 bytes
SHA-256: bb78dffcbb417a1e8f2e6701ba5f2119f32fd3714bc81e0885335e0b54279643
font_01_sfnt_off0000657f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 18952 bytes
SHA-256: 26d2b63b5a18efab6c4940dc4924ef6e0265af068ca8e87d0d09cb70c9337e2d

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