Malicious PDF — malware analysis report

Static analysis result for SHA-256 707a118a2cb14c21…

MALICIOUS

PDF

34.9 KB Created: 2021-07-03 20:22:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e213880bbfc2a88efc16847fb614ba56 SHA-1: e813ce760f89429a9ee690e15874e7015da40fa5 SHA-256: 707a118a2cb14c213a4522621e59f2180d46888e3bb63926e53ff9f847cf01ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free spins' for popular games. The embedded URLs, such as http://netcdn.tw/app/406889139/coin-master-free-spins-april-2021-game-hack, are designed to lure users into clicking, likely leading to further malicious content or downloads. The ML classifier also strongly indicated maliciousness.

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/coin-master-free-spins-april-2021-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/ulgames-resources-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-cheats-tool_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-giver-no-verification_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/2021-roblox_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-sans-hacks_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-escape-the-labyrinth-roblox-hack_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hack-para-roblox-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-btools-hack-script_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/tiktok-for-free_GM835599320.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robuxglobalcom_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-make-a-roblox-audio-for-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-robux-website-no-verifcation_GM431946152.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
font_00_sfnt_off00003110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3110 22908 bytes
SHA-256: bab1d422ad55536859f2d0f8171b2bab40acc71d15c43b6dc7bf17f820cf78a1
font_01_sfnt_off0000646e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646E 18652 bytes
SHA-256: f450b6131960b2f2530361d55bff5afbccc3746f58132bfdde4257a36559d8a2

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