Malicious PDF — malware analysis report

Static analysis result for SHA-256 5212ad6722ba6052…

MALICIOUS

PDF

42.1 KB Created: 2021-05-17 18:04:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: de65571c260b96e993370c7c0ea4aa71 SHA-1: 04676595a08c3d64913b5909e29c5838dd63c7d5 SHA-256: 5212ad6722ba6052ba257b820592719fbd2c5a11b4ef4ef2a7fc9b9f01679f71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and generators. The document body and embedded links suggest a lure to download potentially unwanted or malicious software. The ML classifier also strongly indicated maliciousness.

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/479516143/best-minecraft-hacked-client-game-hack In PDF document text
    • https://kojak-group.com/userfiles/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/coin-master-official-fan-page_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • https://kojak-group.com/userfiles/files/free-minecraft-skin-packs_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C2 24860 bytes
SHA-256: a3381a42f8a975f39d0db11cac3c0e7ebff6ed702fa0ab9a33044338febfd5f7
font_01_sfnt_off00008262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8262 18200 bytes
SHA-256: 05f9c4237b996275e109c4becad50b5cb7d88affc4d3e55964976ee2f9eee8f2

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