Malicious PDF — malware analysis report

Static analysis result for SHA-256 9368e7087d823b2f…

MALICIOUS

PDF

30.4 KB Created: 2021-07-19 08:21:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11ab182f8aef2c79f435669584de3e11 SHA-1: 27538ce5b05773b9853c582b3303a2692ef815b8 SHA-256: 9368e7087d823b2fceea43df0cdeb4faeb58abe0f051d8e331ad15a9897186f0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising 'free Robux' and 'game hacks' as a lure. One of the embedded links points to a known malicious redirector. The document body and embedded artifacts suggest a social engineering attempt to trick users into visiting these malicious sites, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0798

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 http://netcdn.tw/app/431946152/free-robux-no-verification-no-survey-game-hack In PDF document text
    • http://elearning.man1konselkonda.sch.id/__statics/gudangsoal/files/free-promo-codes-for-robux_GM431946152.pdfIn 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_off00002198.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2198 22300 bytes
SHA-256: 8d34f5f202a968bfc3c05d5a6dc5d7ea004a28b4e2636aefdd4c6c935fec972a
font_01_sfnt_off000052b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52B8 19080 bytes
SHA-256: 3aa5536e13f08746819f67c2713727982ed9c08100d434dc46d7ecdd471cfd15

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