Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1bc6aed5debef6…

MALICIOUS

PDF

34.2 KB Created: 2021-06-20 04:52:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fe16a4cf34aa05e4cc8bb8c6e0f43a02 SHA-1: 30c9d6646ebcd68948913e1098429be58a290304 SHA-256: bd1bc6aed5debef66c20133942821176808b608cefa0fb983236d84854aa11f0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs, with a critical heuristic firing indicating a link to a known malicious redirector. The document body and extracted URLs suggest a lure for 'free generator / game hack' content, specifically related to Roblox. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the primary attack pattern involves redirecting the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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.co/app/431946152/free-clothing-catalogs-roblox-game-hack In PDF document text
    • http://digilibfisip.uwks.ac.id/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/hack-shrek-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-toys-for-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-robux-for-free-2021-july_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-developers_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-negg_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/final-stand-2-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/can-you-get-roblox-on-switch-for-free_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-hack-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-2021-hack_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-code-generator-dangerous_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-roblox-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/giving-away-free-robux-cards_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-hack-robux-gratis_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-roblox-using-inspect-element_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off000030b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30B3 21776 bytes
SHA-256: d04e5696c47172a49ec752bb0a14ed1a2c9205e7fa8486724fbf6b7200408c7f
font_01_sfnt_off000060b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B9 19040 bytes
SHA-256: 50a7e12b17cc9eeed4d39453cc8778e6ff249ad6c1afad8b5fb5ed29dde25d62

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