Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f873b7ffeeb5b76…

MALICIOUS

PDF

48.6 KB Created: 2021-06-03 11:13:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 684fc36a79197edaaa669b41d02cf400 SHA-1: fbb4d4af8fbde6db0548bc696f23ed68e5e9a15c SHA-256: 9f873b7ffeeb5b768a23743e6f1dfa2c6deb77d592f9028b8b4ddd5a7ded1582
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary lure related to "Robux Generator" and "game hacks". The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it links to external redirectors. The document body, though partially corrupted, contains text and URLs consistent with a phishing or scam attempt designed to lead users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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.online/app/431946152/robux-generator-no-survey-game-hack PDF link annotation
    • http://perpus.polimarim.online/repository/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/complete-offers-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-spin-app-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/robux-website_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://perpus.polimarim.online/repository/is-it-possible-to-hack-coin-master_GM406889139.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_004_off0000547a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x547A 30912 bytes
SHA-256: 0308d13d3d021db118c99152b0165c464d6b8bad3d2c8a43fce2eff4e827a112
font_01_sfnt_off00009afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFD 18476 bytes
SHA-256: 8d7caae1347775e8ca08dc472fe9114d87f2701527a8ea14c41e6a126f1cfe3e

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