Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca6dd124eb2405c…

MALICIOUS

PDF

42.0 KB Created: 2021-05-12 20:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: db69a70713d3329456f4cf2a85299209 SHA-1: 4ec0dc7a432e223956bb444d46589a234b793aad SHA-256: dca6dd124eb2405cee5b2696f82e13a6ff0fc7899252e8927f2b458ae6fd4793
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to appear as "game hacks" or "free generators" for popular games. These links redirect to malicious infrastructure, specifically `https://netcdn.xyz/app/406889139/is-coin-master-hack-safe-game-hack`, which is flagged as a malicious redirector. The document's primary purpose is to trick users into visiting these malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/is-coin-master-hack-safe-game-hack In PDF document text
    • http://www.museodopobo.gal/web/uploads/files/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/robux-apk_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/www-free-robux_GM431946152.pdfIn PDF document text
    • http://www.museodopobo.gal/web/uploads/files/how-to-get-free-robux-without-verifying-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_off00004a3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A3A 25352 bytes
SHA-256: f748ce227b11468d60586c27d5c06ecc615e27ebf5295f47102b737da6d67e73
font_01_sfnt_off00008388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8388 17716 bytes
SHA-256: fe1f2daf970176796b30352a80040e1234ee7b6b28ca613a5dcb302da82e852c

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