Malicious PDF — malware analysis report

Static analysis result for SHA-256 d499a893f724679a…

MALICIOUS

PDF

43.8 KB Created: 2021-06-08 18:26:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 18a695ebccdc9e4fa6d0f87a21b3cb64 SHA-1: 6d1d1c835190bf3a4743864e63591ee825cd7fd1 SHA-256: d499a893f724679abf4b709af129499b02dde7066c889d846155070cdc15bf49
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and generators. The ML classifier also flagged this PDF as malicious. The presence of these lures suggests the document is designed to trick users into visiting potentially harmful sites, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-hack-genwrator-game-hack In PDF document text
    • https://www.vista-design.hr/files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/master-coin-hack-mod_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/roblox-system_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/100-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-followers-on-tiktok-no-human-verification_GM835599320.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

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_004_off00004e81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E81 24772 bytes
SHA-256: 5b8c32595b97562f2e04a2694efc70857262a376e061350601b406496c85b3ab
font_01_sfnt_off00008797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8797 18452 bytes
SHA-256: f41032e022e085d18068eb68b7b7ac47edaca38e8ea49d424b4e3e23366fec39

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