Malicious PDF — malware analysis report

Static analysis result for SHA-256 52e1f4c421fee163…

MALICIOUS

PDF

36.0 KB Created: 2021-06-20 12:39:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 43ed7030117874fd3e2b00de5069a716 SHA-1: 722140885d2841771d435d53c94b104a7e029b97 SHA-256: 52e1f4c421fee1636b65423c80e4c9aab2652fde490d3e29b324c727eaeadce4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with one specifically identified as a malicious redirector. The document body text and heuristics indicate a lure for free game currency or hacks, aiming to trick users into clicking the malicious link. This likely leads to a phishing site or further malware download.

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-gift-card-codes-2021-unused-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-hack-on-tablet_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-retrieve-hacked-account_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-verified-on-tiktok-for-free-2021_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-website_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-admin-roblox-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robloxfun-com-generator_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/instant-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/earn-robux-sites_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-glitch-november-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3339 22680 bytes
SHA-256: e6094645b7ed005820b9d534b21408156a81f99a3aade0e3f8998a0626fedee5
font_01_sfnt_off00006603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6603 19516 bytes
SHA-256: fba05de39af7e0e5cc2095a5837e8ddb0aa7aadfa194c59cf4ac5e1874220883

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