Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49d35ef4903decd…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 08:03:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 8a631c76aefd63e17739c2e4e51b617d SHA-1: f0ea1d17876bfa2ce0719fefee2c90777dc6dd9b SHA-256: f49d35ef4903decdb21abdd5f3df5f5fb476e6fbfc6a4e6eac671bab3c139966
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that point to a known malicious redirector, specifically designed to lure users with promises of game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a visual download button further supports a malicious workflow. The document body confirms the lure, and the embedded URLs are the primary indicators of compromise.

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.tw/app/431946152/free-headless-head-roblox-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-studio-free-app_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-noob-outfits_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-jailbreak-hack-teleport-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-apk-ios_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-speed-hack-in-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-escape-room-cheats_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-hats-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/dominous-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacking-incident-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/mediafire-hack-30-robux-gratis_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-como-tener-robux-gratis-sin-hacks_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_off00002e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8E 22164 bytes
SHA-256: 10b6d26c92096dbc04229df0c759e5b3b8e9c21659046bc471a6fec59b2a1dcf
font_01_sfnt_off00005f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F98 18824 bytes
SHA-256: 7384526ce2dd4d92cd45550fda12bae152729c1e692f7aa7bf6070bc228cd510

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