Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5f5af7e8892bbca…

MALICIOUS

PDF

42.7 KB Created: 2021-05-16 15:16:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 00f9deb9394bbf1ae913a4a5e4ae875b SHA-1: fe6fb594bc7ebf708a7656a4fc9de30f142aaaeb SHA-256: e5f5af7e8892bbca35ff7a089cbc3298165dc1e0e622f74ae0d2f22bad9638d3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also strongly indicated maliciousness. The document's primary function appears to be directing users to potentially harmful websites through social engineering tactics, likely as a precursor to further malicious activity.

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/free-coin-master-account-game-hack In PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-roblox-accounts-with-builders-club_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-link-spin_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-com_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/new-free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-hacked-client-112-2_GM479516143.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_off000049ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FF 25900 bytes
SHA-256: 85910e95d22edd249a9c9e81deaf36a55637dec32ac6b0fa6ed17b0098d359ac
font_01_sfnt_off000085ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EA 17848 bytes
SHA-256: f7120fc9d40fb44b0e1dad884c259b97d4cdc943ab10fa57fb5029601f08dd69

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