Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d5b299777447a9b…

MALICIOUS

PDF

29.8 KB Created: 2021-07-06 06:08:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 121816b8902b7d0763facea6f480c0ef SHA-1: 73528b505fc34d700d415f5e8521d11cacc5c189 SHA-256: 5d5b299777447a9bc4d72d075f7219df264432276460fd2a49355c87323ec35f
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The primary URL, http://netcdn.tw/app/1330123889/pubg-uc-top-up-game-hack, is directly associated with this malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering tactic to redirect users to potentially harmful content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 3

  • 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.
  • 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/1330123889/pubg-uc-top-up-game-hack In PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-paypal-accounts-with-money-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-jailbreak-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/como-tener-robux-gratis-sin-hacks-y-sin-inspeccionar_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-cracked-apk-free-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-gen-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-working-genearator-w2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-free-face-accessories_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-gear-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-vip-server-free-link-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-de-roblox-2021-diciembre_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/1-million-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-admin-on-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off000028a9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x28A9 23300 bytes
SHA-256: fef6fe60f3c6da93adeeddc01b30d955826d19b91db72bf96feabb6fac70dd21

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