Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98880c4b6807a26…

MALICIOUS

PDF

41.9 KB Created: 2021-05-13 01:36:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 859fe3f7998b56e42eb3738747e6497a SHA-1: 75f410ed6c100a179563608e49012493ab07806f SHA-256: b98880c4b6807a26c6d88636666da175362535b99bfcea05fefc9e2a2e78640b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with game hack content. The ML classifier also flagged this PDF as malicious. The embedded links, such as https://netcdn.xyz/app/406889139/coin-master-spins-hack-iphone-game-hack, are designed to lead users to potentially harmful sites. The document body, though partially corrupted, contains references to game hacks and the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/coin-master-spins-hack-iphone-game-hack In PDF document text
    • http://dream-house.de/images/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/blox-best-robux_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • http://dream-house.de/images/roblox-exploit-download_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-free-spins-link-today-ios_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/free-robux-games_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://dream-house.de/images/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://dream-house.de/images/free-robux-no-human-verification-2021_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_off000046d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46D3 25824 bytes
SHA-256: e7e00dba9daf1e40d8d43a94b4bb74e3d65096afce7af1f0055a575eb877e807
font_01_sfnt_off000081ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EF 18060 bytes
SHA-256: e81d352b07e1ce097e3d885718cd431adb2fa9f9fe53d93d172b47981e22424a