Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8cf5e23200c87f8…

MALICIOUS

PDF

34.9 KB Created: 2021-06-18 23:48:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0adfd857df83bb0a5205c66022ded582 SHA-1: 2974e5521ef760ddfb46176ddfc22634ab10a75c SHA-256: a8cf5e23200c87f8cd5b89ca55bde3e47dcb6d1231ad2c3882c16f744fdbbd0c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for 'free Robux' and 'game hacks', directing users to the URL http://netcdn.co/app/431946152/free-robux-redeem-codes-2021-game-hack. This URL is flagged as a redirector for malicious content. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the PDF structure and embedded URLs suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-redeem-codes-2021-game-hack PDF link annotation
    • https://digilib.stikesindramayu.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-items_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-rebirth-codes-for-pet-simulator-2-on-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-2021-december_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-roblox-studio-boy-hair_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/2021-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/robux-hack-no-download-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-free-coins-and-spins-link-today_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-money-hack-amd-city_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-app-hack_GM406889139.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
font_00_sfnt_off00002f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0F 22696 bytes
SHA-256: 8818bce2ae77288e875ecd4ba6f28aabab6d7ad2bde6f1b5fe63ff77b8cc74e1
font_01_sfnt_off0000619f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619F 19552 bytes
SHA-256: 9e1dac473263c0de9d7d37a0c1ac97fc6faf5ff8611277a673aaa799431b51c3

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