Malicious PDF — malware analysis report

Static analysis result for SHA-256 77064414f86dc85b…

MALICIOUS

PDF

35.8 KB Created: 2021-06-25 17:08:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: db9d4bff428ab60b034039a5983d7d67 SHA-1: cb99783a1ec83d3b8b505b40d86a69d1e5fedf85 SHA-256: 77064414f86dc85ba5aca87981c5164d0240ddc8abbc2879620597565d67d107
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text lures related to 'free Robux' and 'game hacks', aiming to trick users into clicking. The primary link, http://netcdn.co/app/431946152/free-robux-no-survey-no-download-no-human-verification-game-hack, is identified as a malicious redirector. This suggests the document's purpose is to redirect users to potentially harmful websites, likely for phishing or malware distribution.

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-no-survey-no-download-no-human-verification-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/xonnek-roblox-jailbreak-hacks_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-2021-robux-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/game-roblox-free-online_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/veste-army-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-escape-room-cheat_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/10-roblox-gift-card-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/app-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/best-free-roblox-lua-executor_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/fazbear-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-hack-robux-download-ios_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/robux-free-co_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/como-volar-en-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-through-coin-pop_GM406889139.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_off00003152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3152 22424 bytes
SHA-256: 5df82a46a2ae1951022d19ee1ec7d740b77908150c7410f55aae7b1bc8c899e8
font_01_sfnt_off00006380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6380 20208 bytes
SHA-256: 0a23923edf2899bc8b903b095c2216ee899d9c2671d5ade23ac5561df3c39909

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