Malicious PDF — malware analysis report

Static analysis result for SHA-256 cded918b4f9bf6d9…

MALICIOUS

PDF

42.2 KB Created: 2021-04-22 16:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 67f7f621f6a87fd6653067378088510d SHA-1: b82fe8aca1cf059c5f9c750ff8a8708421fcc396 SHA-256: cded918b4f9bf6d912da9c88392f7095eac01f2a0692148113bd9ba6e67bc7c6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a prominent link to a website offering a 'Roblox Vehicle Simulator Money Hack Download', which is a common lure for malicious downloads. The ML classifier also flagged the PDF as malicious. The presence of multiple related PDF files hosted on sunnygarden.com.tw suggests a campaign distributing similar lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8575

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.
  • 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://netsecure.pro/app/431946152/roblox-vehicle-simulator-money-hack-download-game-hack PDF link annotation
    • https://sunnygarden.com.tw/image/data/files/wanted-money-hack-roblox.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/roblox-ccv3-speed-hack.pdfIn PDF document text
    • https://sunnygarden.com.tw/image/data/files/how-to-hack-in-cafe-v4-in-roblox.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_003_off000038a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x38A2 26844 bytes
SHA-256: f3f5072d205957fa0f6150aad9ac27089f1f45b605e07bd68d84c962528af42e
font_01_sfnt_off00007488.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7488 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00007e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E39 19988 bytes
SHA-256: 50960b260865f12ea5da41162ac8502d2ad3f861b7fc8e0084ab36a98fae0b34

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