Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b1884c4721c4c7…

MALICIOUS

PDF

35.4 KB Created: 2021-06-29 05:48:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 58a6bd199651a4f535b7d168d6669a90 SHA-1: ddf5f2f37e92b4fddb1d13cc30e57a7f52776e63 SHA-256: d7b1884c4721c4c7e13721d615ab62169c9c6eb9fde74f48cf539d50363bebd1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, disguised as 'free generator' or 'game hack' lures. The document body and embedded URLs promote topics like 'How To Hack Roblox Free Robux 2021', indicating a phishing or scam attempt. The primary malicious action observed is redirecting the user to potentially harmful content via the provided URLs.

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/how-to-hack-roblox-free-robux-2021-game-hack In PDF document text
    • https://www.knjigebuducnosti.com/files/free-roblox-headphone_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-do-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/get-any-roblox-item-for-free-new-2021-working-legit_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/robux-app_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/robux-free-co_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-to-get-free-robux-real-not-fake_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/roblox-hair-for-free_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/google-only-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.knjigebuducnosti.com/files/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3297 22240 bytes
SHA-256: bbf5e3e37ebc5f7a3a03d27cf885050edd1b276501ccefd16c6436b6930fdb9b
font_01_sfnt_off00006404.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6404 19528 bytes
SHA-256: 0ea56fc9ec4ddac6c3d216bd78e37efa370462606f735cb41edc8d86764203e9

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