Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d57b9623d4cd71…

MALICIOUS

PDF

33.8 KB Created: 2021-07-19 18:31:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b270ed60581e6373ba2529b6458e22d4 SHA-1: af2406fc401f932cdf3c2cc2854fb3a675d3765e SHA-256: 33d57b9623d4cd7170d6be227eabb271bad8dcb89891af18d724908da49eba38
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links disguised as "free generators" or "game hacks" for popular games, which is a common lure for phishing or malware distribution. The primary redirector URL is http://netcdn.tw/app/479516143/how-to-download-minecraft-for-free-game-hack, which points to further malicious infrastructure. The document body also contains a call to action, 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', reinforcing the deceptive nature of the content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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/how-to-download-minecraft-for-free-game-hack In PDF document text
    • http://dygmotors.com.py/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/hack-tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://dygmotors.com.py/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-get-free-robux-2021-easy_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_off000030d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D2 22244 bytes
SHA-256: 5e7841c139935cb66769c206e074bce2f5b02d609306f62f3a036d4373e4760d
font_01_sfnt_off0000621f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621F 18292 bytes
SHA-256: 99621570461cd7d06d3aeee2d5a7201c5e27378a0102ff29a57c60fd25da4758