Malicious PDF — malware analysis report

Static analysis result for SHA-256 4581d72284b4abf1…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 02:30:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 82f30ff8dd548c5d13c542c2f1f1f409 SHA-1: 54b25f9bd1f2f3d59e872c5291127c3595f692de SHA-256: 4581d72284b4abf14fdee4e9348861eb0cb9894348874b32c155d3babcac159c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to malicious infrastructure. The document body, though partially corrupted, contains text related to game hacks and includes the same malicious URL. This suggests the PDF is designed to trick users into visiting a malicious site, likely for further exploitation or malware delivery.

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/406889139/coin-master-links-to-free-spins-game-hack In PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/ninja-legends-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-free-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/pokemon-go-free-bag-upgrade_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/10-dollar-roblox-card-codes-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/android-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/como-ser-pro-20-en-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-free-daily-spins_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_off00003342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3342 23260 bytes
SHA-256: df7a52e683f6056d1b81949780d77ff9ac3efe4c0e35b066b540e21adf657894
font_01_sfnt_off00006794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6794 18344 bytes
SHA-256: 8c6747682b97d7044a50dfe25eec500f123ad83a8e365e01e27cac4c7ce102d6

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