Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cdc10bdfbbfe3ab…

MALICIOUS

PDF

34.1 KB Created: 2021-07-20 03:01:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 888b1b29fe51395e45d8cd5e7cdef29f SHA-1: 76119cea28adc14d39eb653a832d632a30fa875b SHA-256: 5cdc10bdfbbfe3ab21b85c6ef98377f9327ea3ebac0433620e6bdee07f0a6235
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 4

  • 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 http://netcdn.tw/app/431946152/robux-hacks-2021-game-hack PDF link annotation
    • https://w-i-r.de/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://w-i-r.de/images/how-to-get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://w-i-r.de/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://w-i-r.de/images/free-robux-today_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://w-i-r.de/images/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://w-i-r.de/images/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • https://w-i-r.de/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://w-i-r.de/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off00002ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE4 23336 bytes
SHA-256: e6ef918c7fbd09d4699394ae279bae2d55defb587cb63b817079b206049a626c
font_01_sfnt_off00006183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6183 18836 bytes
SHA-256: c25860e926ea61b583b1bca699862cfc3d326a91e52da2ecb3910b80af1c4ab7

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