Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f472fcddd7df7b4…

MALICIOUS

PDF

43.6 KB Created: 2021-05-10 22:42:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 02c856953047eac94524ee3a07050908 SHA-1: f426ce050d17221f284a497d68c1ed058bbe52b1 SHA-256: 9f472fcddd7df7b472339064722891043a9b93045abc111e388b8a20234d6677
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, all designed to lure users with game-related promises. The primary malicious URL identified is https://netcdn.xyz/app/479516143/plug-toolbox-for-minecraft-free-ios-game-hack, which is part of a larger set of links pointing to SEO-optimized PDF documents. No scripts were extracted, but the document structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/479516143/plug-toolbox-for-minecraft-free-ios-game-hack In PDF document text
    • http://greasley.website/images/roblox-free-items-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-app_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/daily-free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-spins-download_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://greasley.website/images/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://greasley.website/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://greasley.website/images/how-do-you-get-free-roebucks_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
stream_003_off00004db3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DB3 24840 bytes
SHA-256: 49d7372d89e0558897f93f2d8578acae658b699366fc6e0b83ad153d3ae0762c
font_01_sfnt_off000086ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EA 18736 bytes
SHA-256: 9cf7fe8b5647e01d4eb492bc675b0c64d11ed2e32af9da0d2909089a9be9f8b8

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