Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb3675b3ff3d62f…

MALICIOUS

PDF

34.6 KB Created: 2021-06-28 16:40:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c7df32c752506d77a626dc505a1aa003 SHA-1: e0e39d8d4671d44c407fdb74c5a0f56918c70739 SHA-256: 5fb3675b3ff3d62f9eca080953bb0e8181fe1f2cb156f7c43be5ec72b1fe431a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one that points to known malicious redirector infrastructure. The document body and heuristics indicate a lure for free Robux or game hacks, designed to trick users into visiting the malicious URL. No scripts were extracted, but the presence of malicious links and the lure strongly suggest a phishing or scam attempt.

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/431946152/20210-robux-for-free-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-250-robux-for-free_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/como-ser-hacker-en-roblox-con-usb_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-robux-hack-descargar_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/6-pack-roblox-shirt-for-free_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-hairstyles-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hackin-anybody-account-in-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-scam_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/www-roblox-cheatus-limited-amount-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-someone-on-roblox_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_off0000306c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306C 22420 bytes
SHA-256: e82d1530e8b79a9927060a6b6c0d882dac36e780a53810d26db3dfc5482fd2aa
font_01_sfnt_off00006220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6220 19116 bytes
SHA-256: 46b6d0275138487d24ca16497f636915a6275a54ce4394516224517765e536f7

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