Malicious PDF — malware analysis report

Static analysis result for SHA-256 604e75e2fd5b94a5…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 10:10:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 38c8c24b29e85100f69c63af82bb7449 SHA-1: 7499881db941c93d4d7b69fbdd4e76ddf4fbf9d5 SHA-256: 604e75e2fd5b94a5a98c1dadcf774017b5387813f9685e8f9292875aa7bec456
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The document body and embedded URLs reinforce this social engineering tactic, aiming to trick users into visiting potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious redirector designed for user exploitation.

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.tw/app/479516143/how-to-host-a-minecraft-server-for-free-game-hack In PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/robux-hacks-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/app-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/roblox-how-to-get-free-tix_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/how-to-teleport-hack-in-roblox-jailbreak-2021-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/roblox-invincibility-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/hack-roblox-games-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/rbx-website_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/roblox-com-hack-account_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/khaos-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/roblox-cheats-fr-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/monttechscom-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.akper-serulingmas.ac.id/repository/roblox-free-items-glitch_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_off0000308a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308A 22244 bytes
SHA-256: b44cb699d33b276dbc3f65b2f1d504e99fed50167a10bc061a91d10ac15ce389
font_01_sfnt_off000060ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EA 18276 bytes
SHA-256: 436412b7fb518003dd72d9755af4c5c221d015181f25d6fbbc5784d75a3c116b

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