Malicious PDF — malware analysis report

Static analysis result for SHA-256 693b14865cfe8a06…

MALICIOUS

PDF

37.0 KB Created: 2021-05-11 23:34:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 76735bf86c00cef1d10c7a4f3db6b50b SHA-1: 70f93895af7da5fb7abd0ea2ff0b2c6dfa40c5dd SHA-256: 693b14865cfe8a06d53fd37ffe20c3bed99e5c599ec75e15e363f5c61e0e9534
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains multiple links pointing to a known malicious redirector infrastructure, disguised as a 'free generator / game hack'. The document also displays a fake CAPTCHA or human verification prompt to trick the user into interacting with the malicious link. The primary IOC is the malicious URL used in the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/is-there-a-way-to-get-free-robux-game-hack In 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_off00003589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3589 24960 bytes
SHA-256: fc5f67ee17856abed149401df267eb59075115ca34921d6360d8137b208c3b54
font_01_sfnt_off00006d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D55 18892 bytes
SHA-256: e2ca2daecae93cd27ff1d51a172310d30bada5b25af9f9600d3ad780ee102f76