Malicious PDF — malware analysis report

Static analysis result for SHA-256 765d358bac952bc2…

MALICIOUS

PDF

36.6 KB Created: 2021-05-23 05:11:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d23e91ea73f8641f5a9bcec705a33f58 SHA-1: 50d13548611f1af3b8e5b6327886ea8a5a696b19 SHA-256: 765d358bac952bc24276b4e3e7d11c1321ed5113b2116db2338f6d61cbb9bb9f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator / game hack' which redirects to a malicious URL. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick the user into visiting a potentially malicious site, likely for credential harvesting or further malware delivery. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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 https://netcdn.xyz/app/479516143/how-to-get-minecraft-for-free-on-ps4-game-hack PDF link annotation
    • http://www.nicoifruttidelchicco.org/images/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/without-pokemon-go-free-account-2021_GM1094591345.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.nicoifruttidelchicco.org/images/roblox-script-hack_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_002_off0000349e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x349E 25612 bytes
SHA-256: 35cca5006b4d308a000c2a929cb6a3429ff154ee943d2d7c935c368c1d58840a
font_01_sfnt_off00006e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 18088 bytes
SHA-256: 3c584cfdb2e84eddbd4369948c7cb3512903decb89ab4dae7c156f2377516814

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