Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96945dcc1c0aae6…

MALICIOUS

PDF

45.4 KB Created: 2021-05-17 21:33:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b33981168454b862b7dcb0643febdeea SHA-1: 30f489ef3d852d30e79f89ed4e2bdeb99bcf6673 SHA-256: c96945dcc1c0aae6ecfed839e485b34fb083552d6418b0c82a851f38760ad368
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with game-related lures like "Coin Master Free Spins Hack". The primary URL identified, https://netcdn.xyz/app/406889139/coin-master-free-spins-hack-2021-game-hack, is flagged as a known malicious redirector. The document body, though partially corrupted, contains similar thematic elements and additional URLs pointing to related scam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-free-spins-hack-2021-game-hack In PDF document text
    • http://rightlead.com.tw/image/data/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/get-robux-com_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/minecraft-free-online-unblocked_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/robux-premium_GM431946152.pdfIn PDF document text
    • http://rightlead.com.tw/image/data/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c0f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C0F 24656 bytes
SHA-256: e96bf06133549aed3242bb516fc51cf78db1e3d5212cd7336c2f86a5736a7251
font_01_sfnt_off00008441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8441 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2C 18456 bytes
SHA-256: a585848d53eaea1bda4e1de9ee00cb9d2c4270f04f2766c3858066f184342be0

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