Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc01aa85f30d90f9…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 22:30:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d343f862b5da153b0b15ba0d8bff756b SHA-1: 1e1342e9ab5cd5f4580a171ffd61f06c9957c226 SHA-256: bc01aa85f30d90f9bca68bb24b2d022b77bec6695ff297e4bb8b6f7f938e34a5
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 0.9796

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/how-many-levels-are-in-coin-master-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-in-roblox-waitseds-no-time_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coin-master-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-website_GM479516143.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_004_off000051f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F8 27124 bytes
SHA-256: 33c14679d58fd8e40c24c65e7b8d151d18d5ef71fee20bfe91c06297df051ac0
font_01_sfnt_off0000900c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x900C 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000099f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99F7 18076 bytes
SHA-256: 54e54f6e61ae990098bb4cdf24a44bcdd14b606a50495af7ec2cc921364cf956

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