Malicious PDF — malware analysis report

Static analysis result for SHA-256 36fb70badd9455c3…

MALICIOUS

PDF

39.4 KB Created: 2021-05-22 08:41:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 76bbffdec7e8e358981a7ec11d9c3de6 SHA-1: 350681cb1b0cf94bd718c827bd44682fdd532913 SHA-256: 36fb70badd9455c384715101feeb20f72975831ddfe190df4e65e1f908c3520b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users with promises of free Robux and game hacks. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://netcdn.xyz/app/431946152/free-robux-without-doing-anything-game-hack'. The document body also contains this URL and other links pointing to potentially malicious content on 'soma.com.ua'. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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 https://netcdn.xyz/app/431946152/free-robux-without-doing-anything-game-hack In PDF document text
    • http://soma.com.ua/images/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://soma.com.ua/images/free-25-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://soma.com.ua/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://soma.com.ua/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000309e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x309E 24740 bytes
SHA-256: 4a74a4432cd94966306fe2f2e66e9eaeccbf6ae08c72594f52ecad6810b6f6af
font_01_sfnt_off000068bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BF 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00007566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7566 19240 bytes
SHA-256: e1e4d521198b5ef2bb2d2ba3e061f6fd747e7988b39df69dcb6ecbaf810b6a5c

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