Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b186b70f198b65…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 15:49:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6c28ff1659541fb69d97484b6c18ebdf SHA-1: 1477fe437d646abd8ef5df195994bd07280a1706 SHA-256: 79b186b70f198b65ac5361435c84821c8981bec10e8cd0e1539a0addc613a9c0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/431946152/roblox-hack-apk-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hack-naval-warfe_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-hair-roblox-not-model_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-robux-hack-february-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-crashes-when-i-open-cheat-engine_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-verification-no-details_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-printable-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-fly-in-struid-roblox-for-free-youtube_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-developer-console-hack-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/como-hackear-a-cualquier-jugadores-de-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-craftwars-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/superhero-free-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/appbounty-hack-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
font_00_sfnt_off000031e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E9 22540 bytes
SHA-256: b64e29f6e30cab109c3876f4f6739731fbe09bf4a17d98b9df099d3e1e97addd
font_01_sfnt_off0000646f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x646F 18832 bytes
SHA-256: 306f83865665730cccb200b9769a14693e944a35f37b3076e40f03dcf922f572

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