Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c19b3773c26fd2…

MALICIOUS

PDF

36.3 KB Created: 2021-05-22 13:42:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fc16b778de46db641dcc85a660367abf SHA-1: 52148c2b29d51d768c50ba66c6c5b9e80f018013 SHA-256: 62c19b3773c26fd2eecbd20c13a3002e80d154bae61f0451e970f986ac8e3cef
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users with promises of free game hacks or generators. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-games-that-actually-work-game-hack, is flagged as malicious. The document body also contains explicit calls to action and the malicious URL, reinforcing the phishing and redirection attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-games-that-actually-work-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_off00002e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0F 26136 bytes
SHA-256: b45175132d4c0167dc62cd68e9e4733ad854693c9166403068a958b24a8af124
font_01_sfnt_off00006993.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6993 19392 bytes
SHA-256: 2bd118a57b53ff37cab680797aee460eb59fed046ceba4ed0277135d7eae5baa

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