Malicious PDF — malware analysis report

Static analysis result for SHA-256 008a1f9ca665ed72…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 02:59:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bee87d93a0843c4e16ce0c01dccfa0b9 SHA-1: 19382fd11f354a623db4d2eb7b695675289c573a SHA-256: 008a1f9ca665ed724d4b2298b0cded61fcb44a907e2408fcc10fe75cec5ad8f9
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/easy-robux-today-com-game-hack PDF link annotation
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-free-clothes-on-roblox-without-creating_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-model-roblox-broke-game_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-become-a-famouse-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-have-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-arcane-adventures-hack-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-cheat-engine-bypass-updated-2021-unpatched_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/april-fools-hack-roblox-wiki_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-get-free-stuff-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-free-pets-in-pet-simulator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/will-roblox-be-free-on-ps4_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-hack-roblox-passwords-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/coin-master-link_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_off000031ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CE 22256 bytes
SHA-256: 811bcb5df390d0d885bc4ec3947424530c9e7b5ff714d0f47e4891fa132cc261
font_01_sfnt_off00006346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6346 19168 bytes
SHA-256: 4998178e01b6573bad71b3be76ca6238676106c6934825eb3913c5ce476b07d6

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