Malicious PDF — malware analysis report

Static analysis result for SHA-256 80b9fcd9a0932675…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 19:24:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8ae53de85f14d0f6a98c82952dfb83ba SHA-1: 7bb7b06f310e521cf0f16d4da9a6475a6f167d9f SHA-256: 80b9fcd9a093267553536ed6298f8bb8c301507b7788c5e4d570f701163b7ffc
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are associated with known malicious redirectors or link farms. The document body and heuristics indicate a lure related to 'game hacks' and 'free spins', suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious redirection workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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.tw/app/406889139/blogspot-coin-master-spins-game-hack In PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/httpswwwurcouponsdealcom202103coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-re_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-legends-of-speed-hack-pain-exist-descargar_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-limiteds-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/instagram-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-money-links-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-free-hats_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-hack-minecraft-pe_GM479516143.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_off000032eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32EB 23364 bytes
SHA-256: 4b67ace936d48bd732fa2153b7f38d82ffeafb9a4afd8794a0667fb2e8730e5a
font_01_sfnt_off00006738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6738 18300 bytes
SHA-256: fdfe1b61ce949909cc535f1f711a96ca32b9d88f477f5a8c0d77c13cd36164a7

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