Malicious PDF — malware analysis report

Static analysis result for SHA-256 99af466503d59108…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 10:49:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2b1f75af8dd3536340f005fec7a205b6 SHA-1: fe01847fab4571c31762b289f8050e384d610d1e SHA-256: 99af466503d5910879c2a5f0f21edb4a7cba1f3fcce54853442d380d0301fd65
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. It contains numerous links to redirectors and link farms, including a primary link to 'netcdn.co' which is flagged as a malicious redirector. The document body and embedded URLs indicate a phishing attempt disguised as a game cheat or generator.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/406889139/gaming-dunia-coin-master-free-spins-game-hack In PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-2021-generator_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/pubg-uc-avatar-hd_GM1330123889.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/get-free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-windows-10-code-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-roblox-bee-swarm-simulator_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_off000030e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E7 23500 bytes
SHA-256: 37eaafb9b5bd69b89dba4312fe45a40efb33804ef53c631a2d6676476a2e729b
font_01_sfnt_off00006547.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6547 18740 bytes
SHA-256: b864314b23136acdbc9cef453e72c763c24c6f69c6a5d08d10340e372cc06804

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