Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04f872d9598bc88…

MALICIOUS

PDF

34.6 KB Created: 2021-06-22 17:32:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4fe70d6a467c20543ea0fcb6c86d8f86 SHA-1: ae7334370fc928b0c37ac34092f3828022e5d18c SHA-256: c04f872d9598bc887765a1ecb186e2c13e01b80d43ca83db01b5e38849ce8a7c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a game hack redirector lure, directing users to a malicious URL. The document body also contains the same malicious URL, reinforcing the lure. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the primary attack pattern involves social engineering via a malicious link.

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.co/app/431946152/hack-roblox-accounts-2021-game-hack In PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/cheat-engine-patched-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/good-hacks-to-do-with-a-hang-glider-roblox-treelands_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hacks-for-electric-state-darkrp-roblox_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hack-for-robux-2021_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/hack-into-roblox-acount_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-make-a-minecraft-client_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-hack-2021-ios_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-robux-gen_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-on-pc_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_off00003049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3049 22260 bytes
SHA-256: 6aeb410426b97754a1cd40cbc1619abd899d7cf941d50d832bf0ad2044275f35
font_01_sfnt_off0000611f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611F 19300 bytes
SHA-256: 046d269a9910909fb8f0395614d06303403a95f19a4b3bcc85fb1952d5944686