Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b3f76e61d9fa88…

MALICIOUS

PDF

47.7 KB Created: 2021-06-04 04:27:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 77909f8302284d1a726599d00ce8ae95 SHA-1: d49f8dd24e168fa4d6f41dfd739dc2b008e59a99 SHA-256: 65b3f76e61d9fa88e212e1e9a041c29c4b98e1ee735df1630a0d478621b5b27a
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 0.9832

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 https://netcdn.online/app/479516143/minecraft-windows-10-edition-free-game-hack PDF link annotation
    • http://opac.stieimalang.ac.id/repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/robux-giver_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/legit-coin-master-hack-without-verification_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
stream_004_off000053e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E8 29824 bytes
SHA-256: 6d329cc2f6cd84c62767f3ea9c8d23142a24d1218d6c3abb57c79d550f2fa3b3
font_01_sfnt_off0000973b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x973B 18524 bytes
SHA-256: 0bf31bed13672a3e0ec3830f17f3a108a804d8b157495bd7936eaddb95c84b8e

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