Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e9ea40c50786ba…

MALICIOUS

PDF

39.9 KB Created: 2021-05-11 18:32:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dd18b0b97a71fa5b440df086923ed26f SHA-1: a81fd1145b1b8588942efcbfcc0bcb1214c34b7e SHA-256: 35e9ea40c50786bac7372293e124428b2c0e3dbf7efc8a41a299fca133164853
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'free Robux generator' or 'game hack'. The document body and heuristic firings confirm the presence of these lures. The embedded URL is likely intended to lead the user to a site that hosts further malicious content or attempts to exploit the user.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/how-can-i-get-free-robux-game-hack In 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
font_00_sfnt_off0000336a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x336A 26244 bytes
SHA-256: 1b0a127adcf951909f481248526ed5fb837f0c1f89c51f5c833fd4831beea60c
font_01_sfnt_off00006cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB0 3944 bytes
SHA-256: 26eba1eb4b60b63711109bcf313ea2b60dc428d89aa8d45c41827cbd769d05e2
font_02_sfnt_off0000799b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x799B 18512 bytes
SHA-256: 69cba7171cc96811b03769255314e8880e2b1f1f28661a6eda79c3c7ec8a929e

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