Malicious PDF — malware analysis report

Static analysis result for SHA-256 e59967d6d80a0b67…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 07:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 65a0eff9199ffb9647abdc5c293cfe01 SHA-1: 5fa910551d751ae8a55660ade0ceb301f0691752 SHA-256: e59967d6d80a0b67dcf948523a7f5e8b92c0a663198af5b1cd13f76042470bf4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at http://netcdn.tw/app/431946152/free-robux-without-downloading-apps-game-hack. The document body and heuristics indicate a lure for free game currency or hacks, likely leading to a phishing or malware download 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/free-robux-without-downloading-apps-game-hack In PDF document text
    • http://gts.edu.gh/library/repository/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-promo-robux-code_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hacks-for-prisone-life-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-on-roblox_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-cheat-codes-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/hack-robux-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/how-to-hack-levels-in-roblox-naruto-final-bond_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/roblox-hack-client-april-2021_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/free-falling-roblox-codes_GM431946152.pdfIn PDF document text
    • http://gts.edu.gh/library/repository/coin-master-rewards-2021_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_off00002e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2D 22184 bytes
SHA-256: 6d5181ae5a4a368bd58f6fbb39291212f2742d51d9f786adbcefe6510bb311c5
font_01_sfnt_off00005f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F84 20060 bytes
SHA-256: 8436a460c804c08fe10423d7ff888b310581b803afefa6e8463990a0aaecc0a2