Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c531c252dcec136…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 20:16:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e823e68f3176fc2466e8e3688d180f62 SHA-1: 618180d458f5366f446ce58209cfe8efc7ed039d SHA-256: 8c531c252dcec1369c5ff4123c9d5da2f160095563d467b321926d0226cfe355
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a website offering 'free generators' and 'game hacks', a common lure for phishing or malware distribution. The ML classifier strongly 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 direct the user to a malicious site, likely for further exploitation or credential harvesting.

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-games-with-free-boombox-game-hack PDF link annotation
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/hacks-for-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-use-script-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/follow-people-inyo-roblox-games-hack_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-hack-btools-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-robux-on-roblox-on-a-computer_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/robux-hack-without-apps_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DB 21792 bytes
SHA-256: 7fde7fe05ac3703a4021fd3f4635289b064534b40fb16317dc0bc125c66dedac
font_01_sfnt_off000061db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DB 19496 bytes
SHA-256: 1fe97cacaf87faaf7e87019df11dc5da97cf6ecddb8fd4c97aefa44281928813

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