Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0505035ee41f71d…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 13:44:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 7ba1ac63ce69e90e3017b2f5a4daa8da SHA-1: fdaf852eb70c1812bd3da452e7b45cfc8dd17aa5 SHA-256: c0505035ee41f71d6b108dee9747d109efb5e8e3c6fdb473f720605a7f56b09e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a 'free generator' or 'game hack'. The primary link, http://netcdn.tw/app/431946152/roblox-free-robux-no-verification-game-hack, is flagged as a known malicious redirector. The document body and embedded URLs reinforce this lure, aiming to direct users to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the 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/roblox-free-robux-no-verification-game-hack In PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/roblox-heists-hack_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/hack-coin-master-game-apk-download_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.alsultantrading.ae/userfiles/files/free-robux-redeem-codes_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_off00002ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFA 21936 bytes
SHA-256: 5d9d3ed6342ffde3421a57171fd7bd6ce16e5212e3454c7ddca36b83042826ef
font_01_sfnt_off00006039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6039 19148 bytes
SHA-256: 8dddf83a8dc305c7bfb211f3bc3fbf3b1849d9dcf887b2c8b2fcb602871e3305

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