Malicious PDF — malware analysis report

Static analysis result for SHA-256 81353061a01d8dc1…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 09:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8f691d69917476af6950d7baa09f94ad SHA-1: 1f2012e5bdd880e26f541cdd0039c2289439e5e4 SHA-256: 81353061a01d8dc11a4837f9198b9c7e444ba8f33b90fcd9953ead9ccea784c1
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 0.9980

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/booga-booga-cheats-roblox-deutsch-game-hack PDF link annotation
    • https://digilib.stikesindramayu.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/how-to-get-free-robux-on-computer-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-link-app_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/daily-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • https://digilib.stikesindramayu.ac.id/repository/get-free-robux-info_GM431946152.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_off00003039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3039 22028 bytes
SHA-256: 2ff254ed553298d70a29be264a2bd0f581eb81556acf6eb938075bb798702149
font_01_sfnt_off00006117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 19064 bytes
SHA-256: 267075b697b70569c1bc5241d054f230243dc9d29d0def4fbc7c811207adfe01

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