Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b3507e718b8095…

MALICIOUS

PDF

33.7 KB Created: 2021-07-04 11:35:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 843abd5d0be1292c15650a974a7db55d SHA-1: 52dd80c8b59cee8e34c3ecf62c7690c7d04f84c4 SHA-256: 64b3507e718b809541a44b9200722a16cbde41e62b902b663ab3ae8e03c52b76
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to known malicious infrastructure. The document body and embedded URLs reinforce this lure, attempting to trick users into visiting a URL that likely leads to malware or further phishing attempts. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/479516143/minecraft-116-free-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-download-apps_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-earner_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/seven-v2-roblox-free-download-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-roblox-booga-booga-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/tiktok-free-roblox-accounts_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/ho-wto-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-garbage-simulator-script-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-faces-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/rbxoffer-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-items_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-free-robux-com_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_off0000308c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308C 22180 bytes
SHA-256: ebd47f7edf95f4e3b32a8778b26cdf79c118ab0e0b6f3736797baa63e295ec85
font_01_sfnt_off0000619b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619B 18132 bytes
SHA-256: b2108519a49c60d844da2629d098a57ee686039b5b96c7053660c600cced3d73

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