Malicious PDF — malware analysis report

Static analysis result for SHA-256 df2b462fd323ac8c…

MALICIOUS

PDF

40.3 KB Created: 2021-05-20 20:05:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: bcaaa2fd52db96508bfa05f05a7e66fb SHA-1: 1409f240aec4b1b67dc9f2a91c14b981dbe44d92 SHA-256: df2b462fd323ac8c13a2a60df9993645bc26f0ff091dc017fa3170bbb44a231d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains heuristics indicating it links to a 'free generator / game hack' lure, specifically targeting Roblox users. The embedded URL, https://netcdn.xyz/app/431946152/free-roblox-groups-game-hack, is likely a redirector to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting a potentially harmful external resource, aligning with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7718

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/431946152/free-roblox-groups-game-hack PDF link annotation
    • http://www.primeinformatica.it/images/free-spins_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://www.primeinformatica.it/images/hack-robux_GM431946152.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_002_off0000339c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x339C 26916 bytes
SHA-256: 4d08b6768ef5eab2ad8bdb652c40a01356881b57245cc65949a0c550b19c7b8c
font_01_sfnt_off00007223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7223 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00007c32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C32 18264 bytes
SHA-256: 59dbfb19f503ab5ccde5afb48b0ebb207c820587c290c946a9c33262b394e3ff

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