Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32ce33531e76c24…

MALICIOUS

PDF

34.7 KB Created: 2021-06-19 19:51:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 398d66b9d59d4b96cad748dc589f081a SHA-1: d7dfda7f2cc2640cd459a679e7340862a39fc834 SHA-256: a32ce33531e76c2488bc041633dbe6850d17099db86ab7e0b0aa3b6aad127258
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them by promising free game-related items. These links redirect to malicious infrastructure, specifically a site offering 'Roblox Hack Site No Human Verification'. The ML classifier strongly flagged this PDF as malicious, and heuristic rules identified it as a game hack redirector lure and a link to known malicious redirector infrastructure. The document's content and embedded URLs indicate a phishing or scam attempt.

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/roblox-hack-site-no-human-verification-game-hack In PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/wurst-client-18-9_GM479516143.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/infinite-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/robux-adder_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-hair-roblox-boy_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.sixtenlogistics.com/uploads/files/files/get-robux-for-free-2021_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_off00002f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F64 22356 bytes
SHA-256: a2e347e8f97243c189faaf81e328733616ff9748b247aea0ac8c3ba95d5f90b6
font_01_sfnt_off00006152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 19412 bytes
SHA-256: b888ee4411791263f943b40d49a40e2e1f365711714147df886a3d7283772279