Malicious PDF — malware analysis report

Static analysis result for SHA-256 e924361126f51e24…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 13:01:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6b0e5870aae8dee8ed10ab637d642e24 SHA-1: 39490268c7e0970f67845d6b2bd08edafb4cfa67 SHA-256: e924361126f51e24ff23ad6f678b7f48cc73b424640de97f748f5a02ca38c54c
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/406889139/coin-master-free-100-spin-link-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce this lure by referencing popular games and 'hacks'. No scripts were extracted, but the presence of malicious redirector links and the lure content strongly suggest an attempt to lead the user to a malicious site, likely for further exploitation or credential harvesting.

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-100-spin-link-game-hack In PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/roblox-r45-hack_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/hack-de-robar-cuentas-de-roblox_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/www-free-robux-partycom_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/how-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/roblox-muscle-simulater-cheat-codes_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/shinobi-life-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/roblox-royalty-free-rap_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/free-roblox-acc_GM431946152.pdfIn PDF document text
    • https://www.italisaitaly.com/uploaded_files/userfiles/files/moonactive-coin-master-free-spins-link_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_off00003022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3022 22472 bytes
SHA-256: 4c8ec724c590b07ee9686522b77c7630ebb015397ab18f195455a00ced182959
font_01_sfnt_off0000620b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620B 18620 bytes
SHA-256: cfc54751512bc7e110264f73785061a475bf2a76f79571e558b4b9cd93d36ac5

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