Malicious PDF — malware analysis report

Static analysis result for SHA-256 229ec74daf72a70e…

MALICIOUS

PDF

47.5 KB Created: 2021-06-09 12:19:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 7d738c7ee3b62f950ac7db9e31b0bee7 SHA-1: 0d38eb509208cf573e831dc45d1a0d18dff107a5 SHA-256: 229ec74daf72a70e9fed07a67a76d184ff7d62c4f5431ff10267f35dfb4bd99d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as game hacks and free generators. The primary malicious URL identified is https://netcdn.tw/app/431946152/is-hacking-illegal-in-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a redirection-based attack pattern, likely intended to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/is-hacking-illegal-in-roblox-game-hack In PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-robux-zephplayz_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/when-will-heroes-online-be-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/hey-you-yes-you-do-you-want-free-unlimted-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/roblox-skull-kid-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-hack-progamers_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/pokemon-go-accounts-free-list-2021_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://perpustakaan.yudharta.ac.id/etj/repository/minecraft-114-4-download_GM479516143.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
stream_004_off00005162.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5162 29636 bytes
SHA-256: f8f88d9cea2d791652e48cdccedc7c64fe02b4cc7c7d6f7a159565b85df86fe8
font_01_sfnt_off0000964a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x964A 18592 bytes
SHA-256: 0a5e90ebfef7936f3b2a376b7b988dd3a7a8916a0944aa971e72a02e84a63ae4

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