Malicious PDF — malware analysis report

Static analysis result for SHA-256 739f32dce08ab40e…

MALICIOUS

PDF

43.3 KB Created: 2021-06-04 03:12:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e10aef60c5a8ff9c45710f30e1478bf7 SHA-1: a7c1110832c6df15ded184b2ea8ac0f3a507ceb5 SHA-256: 739f32dce08ab40e52eb266063f67a87910ce5ae293dd98951424d2d69dea4cb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a 'coin-master-hack-online-generator' which is a common lure for malicious websites. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a potentially harmful site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/406889139/coin-master-hack-online-generator-without-human-verification-game-hack PDF link annotation
    • http://digilib.stie-yppi.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pubg-uc-180_GM1330123889.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/oprewards-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/app-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-gift-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-spin_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-actually-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_004_off00004fc7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC7 23676 bytes
SHA-256: fc35e85e47af0166f2a484c52824de563ad6c718b936803c8c4c3476abd65b9f
font_01_sfnt_off00008577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8577 18688 bytes
SHA-256: cd935613fc622552088d026563d3601a20192ff4529e6ad67866ad1470b7d2d3

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