Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa7d44cbdebcf0f…

MALICIOUS

PDF

35.9 KB Created: 2021-06-18 07:26:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c0022a62e59918a20ef3fd7531681a51 SHA-1: bac334d31bdb1343b10e87094064f7d7eed16baf SHA-256: 8aa7d44cbdebcf0fabe9a4669d2fe32f1d707bf2dccf6a896ef550318fc79921
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary lure pointing to a 'free generator / game hack' for Roblox. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous game-related lures suggests a phishing or scam attempt to redirect users to potentially malicious sites. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

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/how-to-get-a-free-skin-in-strucid-roblox-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/ac-market-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-hacks-on-roblox-blox-pice-ipad_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-roblox-more-than-20-letters-in-username_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_off00003543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3543 22168 bytes
SHA-256: 9bb1fd59c2fb1c2bb5ff5552982ba8e7b5d3bcc04ee1afa20ce940978937af88
font_01_sfnt_off000065ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65EA 19524 bytes
SHA-256: 6d18b2cd7ddda994f992959b2161fddc6d06bc88569a74d6c07c8c452bf6c5ce

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