Malicious PDF — malware analysis report

Static analysis result for SHA-256 f892a31eb0f2c71d…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 23:12:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 22a01a40cf6e452f6ee9c8e378feace4 SHA-1: ab121e69cd46b0d8baebf71cf719612cb742dd02 SHA-256: f892a31eb0f2c71d0f44873185ab7685d046e6748fd438546ae52d9251217094
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 a malicious redirector at http://netcdn.co/app/431946152/como-hackear-en-roblox-a-la-gente-game-hack, disguised as a 'game hack' lure. This indicates a phishing attempt to redirect users to potentially harmful content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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/como-hackear-en-roblox-a-la-gente-game-hack In PDF document text
    • https://www.itc-nekretnine.hr/files/free-script-runner-roblox_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/tiktok-free-followers-hack_GM835599320.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/roblox-cheat-table-for-cheat-engine_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/cheat-pc-roblox_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-100-no-human-verification-no-app-download_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-free-spins-2021-blogspot_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://itc-nekretnine.hr/files/how-to-hack-roblox-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.itc-nekretnine.hr/files/how-do-i-get-free-robux-on-roblox_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_off00003221.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3221 22436 bytes
SHA-256: 1aed80b0532f157739671c9ad25053be9ccc1ad5f6421827b6613d841a577175
font_01_sfnt_off00006405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6405 19020 bytes
SHA-256: db0b6030b190e9db549b1b2b53d097c63ec6398faac78b840899764b4ab52186

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