Malicious PDF — malware analysis report

Static analysis result for SHA-256 f928d247ece57024…

MALICIOUS

PDF

41.3 KB Created: 2021-05-19 06:40:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: da912a43b42926df7cebc5f59cd6b87c SHA-1: db3551113a7222f697b984e3485bd82b62f0be9b SHA-256: f928d247ece570244c6e1515842e07c14b1997ee1e39497bbca829b326917f06
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on luring users to a site offering 'free spins' for a game, disguised as a hack or generator. The ML classifier strongly indicated maliciousness, and the presence of numerous links to similar lure pages reinforces this assessment. No scripts were extracted, but the document's structure and content strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/free-spins-in-coin-master-2021-game-hack PDF link annotation
    • http://www.bripi.pl/images/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/get-more-robux_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/coin-master-link-app_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/roblox-demon_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://www.bripi.pl/images/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.bripi.pl/images/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/ww-robux_GM431946152.pdfIn PDF document text
    • http://www.bripi.pl/images/roblox-survey-for-robux_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_003_off000047af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47AF 24980 bytes
SHA-256: 2d5a7d384c4bc8ba786a9669d1ae12c5df3dfc3e505fa865e8d1cc816157e5ef
font_01_sfnt_off00007ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE9 18288 bytes
SHA-256: 875184ae642e109850636143811e44f85c5e94aa46544af5e3834b3aaa47422b

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