Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd71361cf82ddaba…

MALICIOUS

PDF

38.6 KB Created: 2021-06-19 23:30:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: bae4e87369848c04db39f75371c265ac SHA-1: 919ecff63b2efcc1a904f2e3470d83530ed4f1d9 SHA-256: bd71361cf82ddaba9bddba749c690acea9f04568e0f40802aff78a0fe61fca8b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and free currency generators. The document body and heuristics indicate a lure to download or access a resource from the URL http://netcdn.co/app/431946152/dragon-life-roblox-hack-game-hack. This pattern is consistent with phishing or scam campaigns aiming to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/dragon-life-roblox-hack-game-hack In PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-robux-legit-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/get-free-tiktok-followers-no-verification_GM835599320.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/how-to-play-minecraft-with-friends-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/weird-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://digilib.akbidarrahma.ac.id/repository/free-robux-without-offers_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_off00003e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E45 23196 bytes
SHA-256: debd713b9546b5da9f584f1df1c2f5d98e401c10b2b92b136a6a7fb8eba6fc56
font_01_sfnt_off0000728b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x728B 18944 bytes
SHA-256: 4dec1a26380b66125a95cee8585a9500c2d1baa5730ec115b23cb7a8790503a7

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