Malicious PDF — malware analysis report

Static analysis result for SHA-256 b26f29be578be77d…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 03:11:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 080c55ab3bb2d40f3a5bff0e2d74526c SHA-1: e6758739f41f833ec736032e758bdae0e9cfa302 SHA-256: b26f29be578be77de580de919d25eaa42be28b1178d2dd72a04062cea3c26873
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a malicious redirector. The document body and heuristics indicate a lure for game hacks and free currency, designed to trick users into clicking the malicious link. This likely leads to the download of a second-stage payload, exploiting the user's desire for in-game advantages.

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/how-to-hack-and-get-money-on-roblox-game-hack In PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-a-free-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-sif_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-roblox-200-primeros-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-claimgg-codes_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-november-2021-hacks_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-robuxian_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/redeem-code-roblox-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-hack-a-group-on-roblox-to-own-it_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_off00003094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3094 22576 bytes
SHA-256: 71be977118ebb3b7aeffa47d51d090957b795d5a090bc36e112c12174743c113
font_01_sfnt_off000062d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D1 19288 bytes
SHA-256: 26391db73d6812df8422b7ca5503e0747a6fe65ca72323b51be7e82cd7283764

Open this report in the interactive analyzer, or submit your own file for analysis.