Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc959eca982e2d2f…

MALICIOUS

PDF

34.4 KB Created: 2021-06-25 21:22:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f84358a4571144173dd01a856487705d SHA-1: a10060894184c9e7b882007538206797f6bf961c SHA-256: fc959eca982e2d2f242974fc9581edf173f7ef6920147afc68e52c77b7dc4070
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure. The document body and extracted URLs suggest a lure for game hacks and free in-game currency, likely to trick users into visiting malicious sites. No scripts were extracted, but the presence of malicious redirector links and the lure indicate a phishing or scam attempt.

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/roblox-blue-tatoo-free-game-hack In PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-clothes-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-hack-in-roblox-prison-life-on-ipad_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-hack-siteleri_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/como-conseguir-robux-gratis-en-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robuxian-hack-to-steal-robux_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/tiradas-coin-master_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/roblox-hack-como-tener-robux-gratis-2021-nuevo-truco_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/robux-gift-card-redeem-free_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/how-to-get-free-robux-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • https://loba.com.vn/public/upload/files/free-song-codes-for-roblox_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_off00002f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F98 22608 bytes
SHA-256: a82fe0e3956a9a4674cd31b5fd64b9c954e28634d2a9a31eca7d1533f0895fdc
font_01_sfnt_off000061ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61EE 18896 bytes
SHA-256: 200f9eadda090ce550c326e68864c13294941e37b8eff01b22e4e6ad7361ce0c