Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c555611b40ff2d…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 17:05:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 95738c9b0cd86e5282df140723809007 SHA-1: dd923b4c4f7b5f9d9a7de0ebbc5674b5e9be5a01 SHA-256: c8c555611b40ff2dd284505258e525c40a690f1219d21b52bc9a0e337d485692
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.co/app/431946152/how-to-instal-roblox-hack-game-hack PDF link annotation
    • http://digilib.akamigas.ac.id/akamigaslib/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/how-to-get-free-likes-and-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/minecraft-pc-free_GM479516143.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.akamigas.ac.id/akamigaslib/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDF 22368 bytes
SHA-256: d9957a70a4e3e011e9a5f5fa2eb66a78e160942edcf42469787cddb0efdf7ca5
font_01_sfnt_off000061e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E7 18924 bytes
SHA-256: fccd210f8e5f73c6419921cef28f765107a9ba1a077344658eb6b786a4c3ece6

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