Malicious PDF — malware analysis report

Static analysis result for SHA-256 2292b3e143498129…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 11:59:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7f1262e0bd584be9ff329d94651acfa5 SHA-1: be6e32ff82d6b859259593ae03d9ce91b781d666 SHA-256: 2292b3e1434981297bbe8985fddb509a7ee9a84789401499c5677a471e6e3ef8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks'. The primary URL identified, http://netcdn.tw/app/431946152/freerubux-game-hack, is flagged as malicious. This suggests the document's purpose is to trick users into visiting this URL, likely leading to a download or further malicious redirection.

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/431946152/freerubux-game-hack In PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/truco-2021-hack-robux_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/roblox-cheat-xbox-one_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/omega-hack-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-coin-master-spins-link-download_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-cool-clothes-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-hack-roblox-speed-using-ccv3_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-affect-the-server-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/how-to-get-free-clothes-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/roblox-adopt-me-free-ride_GM431946152.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/codes-for-free-items-on-roblox_GM431946152.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • https://cleansui.com.tw/image/data/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://cleansui.com.tw/image/data/files/minecraft-bedrock-hacks-windows-10_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
font_00_sfnt_off0000318b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318B 22060 bytes
SHA-256: fc1768b6aecb60e92f3c31927eef84161d8bc1f1d9978859b7f6c1621608b8bd
font_01_sfnt_off0000626a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626A 18572 bytes
SHA-256: a4910544a3301e21d5425f47d387c0dcd2b1454e32e0c532c02705c370365377

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