Malicious PDF — malware analysis report

Static analysis result for SHA-256 c52c2e2c0c4c83ca…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 10:17:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 91ccd9a73d41e21415468aabd9e6e104 SHA-1: 8ed88cfd680a35b4386e46c2da8d26d123b10f7a SHA-256: c52c2e2c0c4c83ca25fdb7b9fc9d86628be7ff8aa053ab6b083d2c4fef9ae645
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links to a known malicious redirector infrastructure, specifically advertising 'Coin Master Free Spin' hacks. The document body and embedded URLs reinforce this lure, suggesting the primary goal is to redirect users to potentially malicious sites for further exploitation. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of a phishing or scam-related attack.

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-spin-ml-game-hack In PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-villages_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-ranked-roblox_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-get-free-robux-rixty_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-get-free-12-th-roblox_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/lumber-tycoon-2-glitch-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/free-case-code-for-arsenal-roblox_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/https-web-roblox-com-games-2021202187-free-join-now_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/roblox-parkour-script-hack_GM431946152.pdfIn PDF document text
    • https://mobile.connecttravel.com.tw/image/data/files/coin-master-bonus_GM406889139.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_off000033eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33EB 21968 bytes
SHA-256: 7ed447b17a2b269a36cd75c74fda1c09ab3d1ede0d68878834f43c2d5fa10ff0
font_01_sfnt_off0000645a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645A 18248 bytes
SHA-256: c18038b999a15e068e0fcec6b3cb299d21e05aa15a09c32d3b19c8c95a871ee0

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