Malicious PDF — malware analysis report

Static analysis result for SHA-256 8944bcc007559cf2…

MALICIOUS

PDF

33.7 KB Created: 2021-06-30 04:54:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4f1d3d00090cdaecfca68c2b674476c1 SHA-1: d40af467c0cc7f8c68c33f1212e3b386a638b43f SHA-256: 8944bcc007559cf20550c3ffc6e122210d40c6c00f8cc1518db999590b54ef2f
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/roblox-free-build-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/download-btools-hack-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-spins-link-download-free_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-tool-india_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-download-free-hack_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-tiktok-famous-free_GM835599320.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-apk-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/install-roblox-free-latest-version_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/ash-greninja-free-shopping-in-roblox-on-roblox-shopping_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/cheat-roblox-bubblegum-simulator_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hack-v7_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_off00002de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE6 22232 bytes
SHA-256: 37e3a69b16fbbc6e7c1fb0d585dfa3ab2f6efbe0dedd18f98d99f3d92e424919
font_01_sfnt_off00005ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA6 19084 bytes
SHA-256: 1deb67d32035a4644f2dd6022642390e4e6f690087994b427eb6cbf8a33b273d

Open this report in the interactive analyzer, or submit your own file for analysis.