Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a9bbb70f76b7fb…

MALICIOUS

PDF

35.8 KB Created: 2021-07-06 08:55:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fde3219a15ac03df479a3ab88f445c5f SHA-1: 0997c5cf0b1e61f744191adaaf3596a396362749 SHA-256: 94a9bbb70f76b7fb2e56eccb445df0eeaa9c58cb12d8dbd482f5b66fdc94a519
160 Risk Score

Malware Insights

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

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators' for popular games. The primary lure URL is http://netcdn.tw/app/406889139/coin-master-free-daily-spins-link-2021-game-hack, which is flagged as a malicious redirector. The document's content and embedded links strongly suggest a phishing or scam campaign aimed at tricking users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/406889139/coin-master-free-daily-spins-link-2021-game-hack In PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/minecraft-pocket-edition-free-apk_GM479516143.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-free-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/roblox-free-robux-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-code-to-a-roblox-robux-reedeem-card_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/testing-5-ways-to-get-free-robux-it-worked_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/how-to-get-free-robux-no-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-clothes-catalog-roblox_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/hack-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • https://www.opertus-me.com/uploaded_files/userfiles/files/roblox-rape-hack_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_off000033bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33BC 22716 bytes
SHA-256: 232982cbcd9fbf611329a900e9bbb5387590b22b9ff79c7eb7288a9d400f7b4b
font_01_sfnt_off00006694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6694 19168 bytes
SHA-256: 9fcdcda61f85103260e2e142676e822332f3bbd5dbf2c81b53e1d0acf8c5ea6d

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