Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee518ca24931be55…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 18:45:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 2c34e17712c69681548756a109cd0578 SHA-1: 30d155c9535a813b695d615d31bb9366b85b61a4 SHA-256: ee518ca24931be554178bd6b4b5f6dfe1d5469923f447f3831b7a7bec2d477f5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to a known malicious redirector URL. The document body and embedded links strongly suggest a phishing or scam attempt designed to lead users to potentially malicious content or further compromise. No scripts were extracted, but the PDF structure and embedded URLs are indicative of a social engineering 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/431946152/tower-of-hell-roblox-hack-game-hack In PDF document text
    • https://www.similar.com.tw/upload/files/how-to-hack-through-walls-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-limited-time-offer_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/mc-the-miner-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/roblox-high-school-life-hack_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-vip-roblox-account-that-really-work_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/how-to-hack-acc-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/free-robux-2021-no-waiting-instant-no-inspect_GM431946152.pdfIn PDF document text
    • https://www.similar.com.tw/upload/files/roblox-its-free-id_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_off00002eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFF 21968 bytes
SHA-256: 71a4c825560f4cc40a7bda236c3b2046df7522d92b63d3531497f13634519b69
font_01_sfnt_off00005f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9C 18820 bytes
SHA-256: 67d90ccee3cd81d7870baf8fe8d56c7f414bb1df208bdee94fd199bc15d066f2