Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d33b819490833b…

MALICIOUS

PDF

30.9 KB Created: 2021-07-21 20:54:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 054ffbdaa1b48c4fe06caca5b62abd02 SHA-1: b6cd9ce0aadd665ef7d26c35b916e84867a81ec6 SHA-256: 37d33b819490833b3c12a85a7b040b0cd35313395ade63a9143838a4338a369e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which redirects to malicious infrastructure at http://netcdn.tw/app/479516143/minecraft-java-free-game-hack. This indicates a phishing or scam attempt, likely to deliver a secondary payload or collect user information. The presence of embedded URLs and a call-to-action button further supports this malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

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/479516143/minecraft-java-free-game-hack In PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/free-tiktok-likes-app_GM835599320.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://www.cryptovision.com/wp-content/uploads/fsqm-files/robux-free-com_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_off000028f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28F7 21628 bytes
SHA-256: 98aa8ad26fc333491a120f8d1b74486c7e96922ba22ead4095633ee1a5cb397c
font_01_sfnt_off00005808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5808 17848 bytes
SHA-256: c651dee67b00b36100d0c208f30a7974f38e9c4fefacd489da3c8fda34869f62