Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a462b557dbe6905…

MALICIOUS

PDF

34.8 KB Created: 2021-06-19 01:15:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c812c5c499223dfefad1c070c47e88dd SHA-1: 52fb3a20b2642044cc43c906eda4933fd7c8fb8a SHA-256: 8a462b557dbe69056ee874d47f1b00a4da53be02bc44264a6d5394d9df867c64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that lead to a known malicious redirector infrastructure, specifically advertising 'free Robux' and 'game hacks'. The document body and heuristic firings confirm the intent is to lure users to this malicious URL, likely for further exploitation or malware delivery. No scripts were extracted, but the primary attack vector is the 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/free-robux-no-verification-youtube-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/rbx-sites_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-4now-info-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/google-how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-hack-download-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-candy-game-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-admin-commands-on-roblox-without-cheat-engine_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-spins-ios_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-redeem-codes-no-survey_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/elysian-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-link_GM406889139.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_off00002f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F62 23120 bytes
SHA-256: 199e3d394f688e0e987bc03822b9de5a3a4c3473b41725e888e32130a2c5e811
font_01_sfnt_off0000623b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623B 19236 bytes
SHA-256: a81847ca7dc9278c367aa9d8273b0490a2b57d751f3bd4ee04559846267262af

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