Malicious PDF — malware analysis report

Static analysis result for SHA-256 85373aa0f336cc76…

MALICIOUS

PDF

35.5 KB Created: 2021-06-18 05:02:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2fb7de8b12e2b033a04ce69ced8cc34b SHA-1: e1462232e522cd9a7692a7ac7b6ed34734fcbccf SHA-256: 85373aa0f336cc76369c983ea0bc42f72a46723cc464245d9b8903046159b384
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game items and accounts to trick users into clicking malicious links. The document contains multiple embedded URLs that redirect to further malicious PDF files hosted on similar domains, indicating a chain of malicious content delivery. The primary redirector URL is http://netcdn.co/app/431946152/free-roblox-accounts-with-bc-2021-game-hack, which serves as the initial entry point for this attack.

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/free-roblox-accounts-with-bc-2021-game-hack In PDF document text
    • http://lesvossolidarity.org/images/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/1-million-robux-for-free-free-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://lesvossolidarity.org/images/how-to-get-free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://lesvossolidarity.org/images/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://lesvossolidarity.org/images/roblox-cheat-robux-gratuit-fr_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://lesvossolidarity.org/images/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/how-to-hack-stats-on-roblox-dbz_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/free-robux-page-demo_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/roblox-immortal-hack_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/coin-master-free-spins-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_off00003278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3278 22384 bytes
SHA-256: bc4dd6ee86a0a244d3b4b65fcc24fc978754625ba14d5603c6f6d02079daaf25
font_01_sfnt_off00006451.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6451 19592 bytes
SHA-256: 67c220b4028659106785ccad11fc2b0dc0ca56d328f87776cf27ad897a434787