Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39d958579ebb985…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 13:15:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 22f070ccf056368448f84d25df8f78fd SHA-1: 29c77a5de602dd5888fcc3c2b2ba58a26469665f SHA-256: f39d958579ebb9855bf2c093e1e51a65285e02e03d47e5dacdf5d1a93c92699b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA 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 0.9865

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-free-spins-apk-game-hack PDF link annotation
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-free-places_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/pokemon-go-free-pokeballs-2021_GM1094591345.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/hack-game-coin-master_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id//repository/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://pustakafpsi.uin-suska.ac.id/repository/how-to-hack-a-roblox-account-easy_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_off00005287.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5287 23960 bytes
SHA-256: 3b4e3d3aad66646ebd3123273035c7f34267aab17240be1289f72b5fced78bb1
font_01_sfnt_off000088fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FC 19384 bytes
SHA-256: 8fd3eed2a1c08c2883d82f454766e0cde68519a9a2385f064480a15184dfc358

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