Malicious PDF — malware analysis report

Static analysis result for SHA-256 35ff39df6e6ed3f1…

MALICIOUS

PDF

48.8 KB Created: 2021-06-11 11:25:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ecf366d41ab4ad06a63637bf3f809f08 SHA-1: b4260d0acb1c117484215405ec84de66be6b0f4b SHA-256: 35ff39df6e6ed3f13f94f739a9160742f0b9c039dd24a5d5225c444c5f6e39f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "game hacks" or "free generators". The primary URL, https://netcdn.tw/app/431946152/how-to-make-t-shirts-on-roblox-free-sell-game-hack, is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to lure users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/how-to-make-t-shirts-on-roblox-free-sell-game-hack In PDF document text
    • http://cornerwebstudio.com/images/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://cornerwebstudio.com/images/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-hack-yourself-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/robuxy-com-generator_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-images_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-hack-2021-without-verification_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/how-to-get-free-robux-on-a-ipod_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/free-gift-card-10-25-50-roblox_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://cornerwebstudio.com/images/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://cornerwebstudio.com/images/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052d4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52D4 26656 bytes
SHA-256: ae8d8f452cc93116b5081d9577ef9f05c741080af31fdca278fe59d34c2a0217
font_01_sfnt_off00009021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9021 2900 bytes
SHA-256: 375e37fc35fa3d2abea2d875c3643b94a25622848639d1f6c982d89cd63657cf
font_02_sfnt_off000099fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99FE 19096 bytes
SHA-256: e8ee7b1eb41fbb005b20ab36289c22c6ece01e7f165afccb1a6c083b1eab2fb8

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