Malicious PDF — malware analysis report

Static analysis result for SHA-256 604c5000e48d7904…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 23:30:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a76ecae3e22909ef6858259bfa6f7c2e SHA-1: e9537911a443d2e820b9b4aaf726bb5c868f5410 SHA-256: 604c5000e48d790451c6928f68d3697e2dc14bd711f25b557a44cfea36cae36b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document contains a lure for game hacks and generators, directing users to a URL that likely hosts a malicious payload. The presence of a fake CAPTCHA heuristic indicates an attempt to trick the user into executing a downloaded file or performing an action that leads to compromise. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to facilitate the download and execution of further malicious content.

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/download-hack-coin-master-game-hack PDF link annotation
    • http://opac.stieimalang.ac.id/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/is-pokemon-free_GM1094591345.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/twitter-free-gift-card-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/pubg-uc-shop_GM1330123889.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-spins-cheat-codes_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.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_off000052ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AB 25132 bytes
SHA-256: 826e4fe630c0d455806ecc748387eac058ca934cffab4113eda388708ebce2db
font_01_sfnt_off00008c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2D 18296 bytes
SHA-256: 014eb3bb80a3687b4d2f2309fc9b410fcca0ecdce13dd0dc67b7e2f0e819dc99

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