Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6eb968065c0856f…

MALICIOUS

PDF

42.8 KB Created: 2021-05-17 23:36:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 09c0a9e5a1f9742b863f2dfd81607e96 SHA-1: 1e4157483abd720385a0130ac3e796e2324d9a18 SHA-256: f6eb968065c0856ff4a74a06514b44de98f79f63c603649269a40e3add0e456c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, leading to a "Coin Master Hack" lure. The document body and heuristics indicate a social engineering attempt to trick users into downloading or visiting potentially harmful content. While no scripts were directly extracted, the PDF structure and embedded links suggest a common pattern for distributing malware or leading users to phishing sites.

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-hack-version-download-2021-game-hack In PDF document text
    • http://gazelletr.com/userfiles/files/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-generator_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://gazelletr.com/userfiles/files/how-to-get-free-robux-without-paying_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_off00004b46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B46 24424 bytes
SHA-256: 1b7387891cc8aa7abc431436dfafa1fcb03d79907ed95a96237c48df3f42554d
font_01_sfnt_off0000831d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831D 18832 bytes
SHA-256: 10a49c8f5e0c2228bf8891dcd296cb3cf64f302ec606424858ebb68f2fddb877

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