Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f80fc7b8851fb0…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 14:31:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a9e93e96c4b88edf6687adf3dae1af32 SHA-1: 3d117b7d65ac6d0ddb45c21661090b3a7f2b81ac SHA-256: a2f80fc7b8851fb0e8e95aa48d0c8fde4c17cde928c93753902753608fd8e0b7
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting 'free generators' or 'game hacks' for popular games. The document body and heuristics indicate a lure to download or access potentially unwanted or malicious content. While no scripts were explicitly extracted, the nature of the links suggests a potential for further malicious activity or download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/minecraft-free-minecoins-game-hack In PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-accounts-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-how-to-get-free-admin-on-any-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/auto-clicker-for-roblox-mac-2021-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-roblox-accounts-2021-with-obc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/robux-hack-no-human-verification-or-survey-or-downloads_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hack-injector-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-roblox-jailbreak-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-hack-roblox-2021_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_off00003052.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3052 22808 bytes
SHA-256: 92822e822ad60e3951c74344deaab892b14ba528388079ab25d55360591377e6
font_01_sfnt_off000062d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D3 17996 bytes
SHA-256: 2dfa5331a9f2119d54c4e551e8437d7962f745d427a4edb313ce7568aa6bc23b

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