Malicious PDF — malware analysis report

Static analysis result for SHA-256 4695b331768a2f08…

MALICIOUS

PDF

30.9 KB Created: 2021-06-03 06:25:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: cdf21d377c002bb11763622df2458c8f SHA-1: 61205590687ada8ef807dfc8976d26f7aa44fe2e SHA-256: 4695b331768a2f0852c86c5638f8366050d1024df01e32de5e486d39327bdd21
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that point to known malicious redirector infrastructure, specifically targeting users with lures related to game hacks and free currency. The heuristic firings confirm these links are designed to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, suggesting an intent to lead users to phishing or scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 https://netcdn.online/app/406889139/offers-to-get-free-spins-in-coin-master-game-hack In PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/www-robux-us_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/rape-simulator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/no-human-verification-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/where-tiktok-free-views-and-likes_GM835599320.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/abd-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005065.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5065 18034 bytes
SHA-256: c87df1d446f79b9ccab56ad80ebee3e61d2fc092fb9e09e9fb144267baf9ce93

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