Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c4965935f22724…

MALICIOUS

PDF

44.2 KB Created: 2021-06-04 04:51:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 930f839ed3e4fd75d6b3ca06d11a2a57 SHA-1: a95c5e825d9c1c948ca4b839bec3e39c72dbec86 SHA-256: 79c4965935f22724016cd54f8b8c84ba64b5edbdc3e893a5a32f9b93773b1239
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-confidence heuristic indicating it links to a game hack lure. The embedded URL, https://netcdn.online/app/406889139/coin-master-free-spins-2021-blogspot-game-hack, is presented as a way to get free spins for Coin Master, a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest a malicious redirection workflow, likely intended to lead the user to a phishing or malware download site.

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-free-spins-2021-blogspot-game-hack PDF link annotation
    • http://perpus.unpam.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/pubg-uc-carding-website_GM1330123889.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-spins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-card-link-free_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://perpus.unpam.ac.id/repository/how-to-get-free-robux-on-ipad_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
stream_004_off00005114.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5114 24020 bytes
SHA-256: 0a07dadf7f4f440213fea82c48417ddd9ef65a5efe136549fa55c89fd580b19c
font_01_sfnt_off0000884e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884E 18864 bytes
SHA-256: a60b4c159fa751d33f4be90868ca767eddc5cf1793b0cfd5ca53ed2f539c329e

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