Malicious PDF — malware analysis report

Static analysis result for SHA-256 462fd7d7ef58e77e…

MALICIOUS

PDF

33.9 KB Created: 2021-07-07 11:50:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 91c37849822694ae80e33ffb9bacf44d SHA-1: 6e81f543c82d86f4ffca1ec5bc3305634d67341c SHA-256: 462fd7d7ef58e77e894f70782de2be3721d2778a6d628f06b914e862ce46e593
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free in-game currency. The heuristic firings confirm these links lead to known malicious redirectors and a lure for game-related exploits. The document's content and embedded URLs strongly suggest a phishing or scam attempt to trick users into visiting potentially harmful sites.

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-daily-rewards-link-game-hack In PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-roblox-followers_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/robux-free-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-roblox-gameplay_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/anime-free-roblox_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/hacker-speech-roblox_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/how-to-get-free-robux-on-ipad-pro_GM431946152.pdfIn PDF document text
    • http://uas.com.my/uploaded_files/userfiles/files/roblox-booga-booga-hack_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_off00002df0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF0 22464 bytes
SHA-256: 186c28635d6c76f47dafdcaec12293aacf45a7a55cfea4fdef129e0df5ebb797
font_01_sfnt_off00006038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6038 18764 bytes
SHA-256: d7ae46f5c05d17a3888d42bd8d81f580db9882425b157d36228d301a60f1f6c8

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