Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e34bf47840adee9…

MALICIOUS

PDF

41.6 KB Created: 2021-04-27 12:04:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c681c30dcc4bcb3bca9949d2e42025db SHA-1: 6450f8cc49b79c2f71a6460bf360e87e6da1dccc SHA-256: 6e34bf47840adee9d8666210a7eec00f197ba09e0020590c29c6582a1a30911e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/431946152/play-free-online-games-roblox-game-hack PDF link annotation
    • https://lib.stie-yai.ac.id/repository/hack-t-shirt-roblox.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-jailbreak-airdrop-spawn-hack.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-no-human-verification-or-survey-2021-on-ipad.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hack-robux-facile-fr.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/roblox-free-items-2021-october.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/how-to-get-free-tix-on-roblox-2021-easy.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/2021-free-robux-hacks.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/hacking-roblox-account-script.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-robux-obby-august-2021.pdfIn PDF document text
    • https://lib.stie-yai.ac.id/repository/free-roblox-followers-generator-2021.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_003_off000042b1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42B1 27160 bytes
SHA-256: fa6d8e37ca1f3a53d0708ec77d2ed0a1b11472236936fb2594ea1daabb7407b3
font_01_sfnt_off00007f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F66 18892 bytes
SHA-256: f30fa75fb396e30aff4202a3dac19d0d5eb9a60db55f709217c69deba1b4111b

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