Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee4419fde1d434e3…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 06:56:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4e11e331f14fd33232dc53a55d582091 SHA-1: 2ff5ce1b5d6bcbf17ad59efccf084031af06c06c SHA-256: ee4419fde1d434e39f1eeb0e4dc44478ba14461dea513b510f2be4f443368104
160 Risk Score

Malware Insights

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

This PDF document is designed as a lure, presenting itself as a 'game hack' or 'free generator' to entice users. It contains multiple links, including a primary redirector URL, that lead to malicious infrastructure. The document's content and the heuristic firings strongly suggest a phishing or scam attempt aimed at users interested in online games.

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/how-to-hack-a-roblox-account-2021-game-hack In PDF document text
    • https://loba.com.vn/public/upload/files/all-free-clothing-in-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-free-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/fazbear-free-robux-scam_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/dev-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/compile-roblox-hack-dll_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-hacked-game-database_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-free-codes-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-offer-wall_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-clothes-roblox-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-glitch-murder-mystery-free-knifes-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/rbxnow-gg-free-robux_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_off00002f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F49 21996 bytes
SHA-256: 0cd048e76a97643367408bdbb8f515c835348f9af9b3b80461c2ca324c290068
font_01_sfnt_off00005fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAB 19468 bytes
SHA-256: 8490c018c81cc22f14dab8ddf5d074d9e4c4287532f70e565512aa2c5e2164f3