Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed805f3387f4e3bc…

MALICIOUS

PDF

45.3 KB Created: 2021-06-11 09:12:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5f9ef966e20ba609cc98afa6287e6cf6 SHA-1: d6794006aacff8a2720646076dbc925e361453bd SHA-256: ed805f3387f4e3bcfc8354616aeb944a2d6344bf976db34a098ae606eeaa8f75
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are disguised as game hacks or generators for popular games like Roblox. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to drive traffic to potentially malicious or scam-related content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/roblox-how-to-get-free-animation-packs-game-hack PDF link annotation
    • https://inspiration-modellbau.de/images/how-do-you-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-cheat-engine-shut-down-server_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-create-a-website-like-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-free-robux-in-roblox-no-hacks-2021_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/admin-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-clothing-items-roblox_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-the-stuff-from-roblox-hack-week-2021_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-20-package-for-free_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/comandos-de-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-hack-roblox-account-to-delete-them_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/roblox-project-jojo-white-snake-free_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/codes-for-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://inspiration-modellbau.de/images/how-to-get-free-robux-not-a-scam_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_004_off00005104.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5104 25604 bytes
SHA-256: 687c95541fb2ca7fbd6452d6c0932c2043810e77db58f926d7e261949a8b0718
font_01_sfnt_off00008bf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF8 19148 bytes
SHA-256: 760b13100de5bfe8bc9e4abcf5d340b5758bd91b92083ed03743b8f013bc5bfb

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