Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f012caa374d5eaf…

MALICIOUS

PDF

44.3 KB Created: 2021-05-12 05:01:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 013121c72b993d043a9c2f34aa048bae SHA-1: 2291d4846bac60ea589b95f8ba58e54d0b2577ac SHA-256: 6f012caa374d5eaf4a9a5144dc605ec8980545f338a65976a87f4f62e1b061a5
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 0.9648

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.xyz/app/406889139/free-spin-coin-master-2021-link-game-hack PDF link annotation
    • http://pustaka.ust.ac.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000492c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492C 24108 bytes
SHA-256: 2a2a9add055ff58648980bdbb392652d907ad4f8fbd5d458b8f6866551430559
font_01_sfnt_off00008067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8067 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off00008a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A09 18456 bytes
SHA-256: 7500aca679d0fadfbda1e17cf023a195ee80a601fef81e7f7ced8cf50182af56

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