Malicious PDF — malware analysis report

Static analysis result for SHA-256 c33fd2015b98aa90…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 15:44:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f49d8600e7f9e8ccea86e5766c9d1d1a SHA-1: 69125f076e73c41fcaec222c7f7e206d8b1c2f97 SHA-256: c33fd2015b98aa90f74f2cc47221bfa4770cdf910e1d0540c07ee1359525187b
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 a URL that is also flagged as malicious infrastructure. The document body and embedded URLs reinforce this lure, suggesting the primary goal is to redirect users to a potentially harmful site. No scripts were extracted from this sample.

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/roblox-gift-card-for-free-game-hack In PDF document text
    • http://lib.akper17.ac.id/repository/pokemon-go-free-stardust_GM1094591345.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-get-free-robux-no-scam-or-hack_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-unlimited-coin-master-online-tool_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-jackpot-hack_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/can-pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-do-you-get-free-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_off00002f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F81 22172 bytes
SHA-256: 7c96a469cfa2996f268ebf3c8bd85f46bc38b4bad2f73e87e9f2d030bd1621f1
font_01_sfnt_off000060bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BC 19048 bytes
SHA-256: 36d692819cd4052ea0b92a15cd52fa98a127e8d11e0430d7a0f06642361bda99

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