Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e68815075e2127b…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 08:48:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9431440cc35c65e31b54469243254c29 SHA-1: cbca29db0eb64338ac654c45e7f4aadf66e622b9 SHA-256: 9e68815075e2127bbcbfbddd4bba2daae9f413747d162efe00e45a413260667a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or free generators. The 'SE_DOWNLOAD_BUTTON' heuristic suggests a call-to-action, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/no-human-verification-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/is-minecraft-free-on-computer_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/download-hacked-games-com-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51B7 25456 bytes
SHA-256: d115721c01a1ddfd34d8c35fc2f4a604500653500e5999df2707c7f0f60c460c
font_01_sfnt_off00008c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C28 2832 bytes
SHA-256: 78e89c8f621d90011ffb7a2107d701d4cdf090a2f2cf42d5a65297289afc8805
font_02_sfnt_off000095d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D9 18328 bytes
SHA-256: 51e143abff7d47cba3402c6d776d710d5255c0d8709eb27426e755154b5a0611

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