Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e4eb359db0fd76…

MALICIOUS

PDF

40.5 KB Created: 2021-05-20 14:07:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3e5fc8a8f21fb36843f2110137c872ac SHA-1: 1b35ce5abada11d25a0ef4b90ca88d6fdb13c7f1 SHA-256: 68e4eb359db0fd760e696f1d473cd93a6720c094a20f38caf4bd4cbe3e27c27c
82 Risk Score

Malware Insights

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

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 0.7776

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-codes-2021-game-hack PDF link annotation
    • http://www.peterbarsony.com/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://www.peterbarsony.com/userfiles/files/easy-robux-generator_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_off00003396.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3396 26816 bytes
SHA-256: 7b45a5bde2c2b383dcb7fa831db7b02daa819bb2b294217e52a8c70767a9f5bd
font_01_sfnt_off00006f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F4C 3608 bytes
SHA-256: 608f0dd4f6bfb6adbccec84228618ee8e4c9e09226d7330efb5300e499d1567f
font_02_sfnt_off00007bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD4 18524 bytes
SHA-256: 2cb7cffe6898b24bffb42f458692356b56cf8186bc9d806687ffddb45d527cfe

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