Malicious PDF — malware analysis report

Static analysis result for SHA-256 40db821fb340569c…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 16:53:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a1a1f9ec6e7a33e78c3558a40a8cb797 SHA-1: f308c88401b5db265e5e5f17e766d88e1c2cedb2 SHA-256: 40db821fb340569cd6037ecb6714619e17b2d0681b688bd46f78b9e7017233ed
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack designed to lead users to potentially harmful content or further malicious downloads.

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-robux-generator-2021-gaming-game-hack In PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/intriga-roblox-free-download_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/dexen-hack-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/i-will-make-you-a-free-roblox-logo_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-jailbreak-hack-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-money-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-hack-into-walls-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-cat-ears-free_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/appcatch-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-free-purple-eye-galsse_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-robux-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-full-spiderman-outfit-free_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-robux-codes-on-tablet_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-admin-hack-2021-november_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/www-mistplay-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-create-a-free-group-on-roblox_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_off0000323f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323F 22012 bytes
SHA-256: 2741bba332a82e2ee179264420e4aa091c76bd370606af823d5d66b3c968d79c
font_01_sfnt_off00006306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 19604 bytes
SHA-256: 376b5680db752559be2a19d583042c896d2635c4a8230799c67e1508c069e530

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