Malicious PDF — malware analysis report

Static analysis result for SHA-256 9676edc8b604f290…

MALICIOUS

PDF

43.3 KB Created: 2021-05-10 22:38:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 89ec26956352281642e3f74259dcbcf5 SHA-1: 08b9eb09a3e1d2fc7e1c50d0b674466e963a3f43 SHA-256: 9676edc8b604f290078b8afdeb95b2a75fb843f180e83196003868dc7dcbf905
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to known malicious redirectors, specifically promoting 'free generators' or 'hacks' for popular games like Roblox and Coin Master. The document body, though partially corrupted, contains references to these lures and the primary malicious URL. The presence of multiple redirector links and the ML classifier's high confidence score indicate a deliberate attempt to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/431946152/get-free-roblox-game-hack In PDF document text
    • http://greenoase.be/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/coin-master-free-daily-rewards_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://greenoase.be/images/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://greenoase.be/images/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/robux-redeem_GM431946152.pdfIn PDF document text
    • http://greenoase.be/images/coin-master-cheats-free-spins_GM406889139.pdfIn PDF document text
    • http://greenoase.be/images/coin-master-hacks-for-cards_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_003_off00004a6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A6E 26056 bytes
SHA-256: fd760ab38572ce2e6f3f22b41a4b88ba33c2d4af8db0c46d023f5667ee51876a
font_01_sfnt_off0000879b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x879B 18052 bytes
SHA-256: 3163a373a79a6ba2b402f3bc3abf4e04b0a5713e8f73e060e65042d4a11df7ac

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