Malicious PDF — malware analysis report

Static analysis result for SHA-256 b517e0467461bcf2…

MALICIOUS

PDF

34.5 KB Created: 2021-06-30 10:16:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: dfe51aad3b412521b3886d1211243631 SHA-1: d48e61bc3e1c2f99f74046d6d904ec72495f696c SHA-256: b517e0467461bcf2b6bf895cef78f27c643b12a525b191f6c22440e5034dc452
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one identified as a malicious redirector, leading to a lure for game hacks. The ML classifier strongly flagged this PDF as malicious. The presence of embedded URLs and the nature of the lures suggest an attempt to direct users to potentially harmful websites, likely for further exploitation or malware delivery.

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/fe2-roblox-gem-hack-game-hack In PDF document text
    • http://lib.untad.ac.id//repository/free-coinmaster-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-gamepass-roblox-script-not-patched_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/change-this-setting-to-get-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/console-hack-robux-no-subscribe-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-have-free-robux-with-site_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-folowers-75_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-clothes-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-printable-roblox-characters_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-human-verification-android-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-how-to-sell-a-t-shirt-for-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/download-roblox-clothes-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/military-base-roblox-free-model_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-can-i-get-robux_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_off00003022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3022 22196 bytes
SHA-256: b5c2383841e7e54f509e5d9f11e43117a575d8f8826340bf0428fd97994eda9f
font_01_sfnt_off00006179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6179 19204 bytes
SHA-256: 16fd0dad85da8c10650d0ccab78b2a2036a5bc8d4a091bec60094e53bc9275bd

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