Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f0cd3f677ea4b8…

MALICIOUS

PDF

37.5 KB Created: 2021-05-13 21:36:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5fbd4a2d19938e6ed762ec31633cc8cf SHA-1: 501150cf95ccdd96496f4c072a045faa140a30ca SHA-256: 28f0cd3f677ea4b847d00331cb95516cbe7149b16887eced50c46c1c02af0ea6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free generators, which is a common social engineering tactic. It embeds a URL that is flagged as a malicious redirector, likely leading to further malicious content or malware download. No scripts were extracted from this sample, but the embedded URL and the lure strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-to-get-free-robux-in-2021-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
stream_003_off000032f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32F0 26076 bytes
SHA-256: ff9ba2b3b489208b9e10e0ecda89d28095762d2db241d26cae8e39d5059e2d6b
font_01_sfnt_off0000701a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701A 18684 bytes
SHA-256: 824acc3fee39cc83a95b513dc81155ec57b17e0207e8ef2cc186232f9d88d4f0

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