Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dabc0a88317dd42…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 08:55:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 1f06fc211f4905c7a44535b57207195a SHA-1: 1c4dc6cc7ca9d4c1140176b018405b33e96bb891 SHA-256: 8dabc0a88317dd420a17e601dc92ba1dd4609fa0e623779db91295db70131cfb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, disguised as offers for free game currency or followers. The document body and embedded links strongly suggest a social engineering lure to drive traffic to potentially malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/835599320/tiktok-free-folowers-4tiktok-site-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-roblox-faces_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-pro_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-how-to-hack-any-account_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-hack-inspeccionar_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-daily-spins-today_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/tutorial-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/pubg-8-uc-buy_GM1330123889.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-generator-com_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-stuff-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/can-you-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-place-view-bot-hack-fourme_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-do-you-get-free-robux_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
stream_002_off000033c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C2 22500 bytes
SHA-256: 3dfd7aea3ed6c5442db9275c4f59b6ecf6d3e7a4e37c52f95f9ea4964904bc05
font_01_sfnt_off0000661f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661F 18272 bytes
SHA-256: 4a50bae798cae8849b9ca19f25248e47a6f51d0f8974af92e5b8353f45f046e3

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