Malicious PDF — malware analysis report

Static analysis result for SHA-256 462ef5d048987c5e…

MALICIOUS

PDF

34.4 KB Created: 2021-07-09 10:52:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2deeebb66508ec61546563a2f49b9158 SHA-1: 545dff78250e66c1046c7f2accb9d05375fc65b8 SHA-256: 462ef5d048987c5e7719fcafc0c449d1bd66bb84b56b47fc16ca2c1b5d0d1c1b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a game hack redirector lure, directing users to a URL associated with malicious infrastructure. The document body and embedded URLs reinforce this lure, aiming to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/how-to-get-free-coins-in-coin-master-game-hack In PDF document text
    • https://nature-air.com.tw/upload/files/roxploits-roblox-exploits-and-hacks_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-free-robux-on-iphone-6_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-do-i-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-kick-off-hacks_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-100-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/codes-to-get-free-money-on-roblox-treasure-hunt-simulator_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-hack-and-cheats-for-exploit-free-download_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/minecraft-esp_GM479516143.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-police-car-free_GM431946152.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://nature-air.com.tw/upload/files/roblox-skywars-fly-hack-2021_GM431946152.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
font_00_sfnt_off00003169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3169 22860 bytes
SHA-256: 3a88ebfa350a2190a6c24a3e24f129f2ea22126eb192ce9dd00e0f1cbf3c1e3e
font_01_sfnt_off00006461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6461 18164 bytes
SHA-256: 9fab875a536b983537b9433768b1ea3e5c55ad95c87001a66781b974c182b662

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