Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6a354aae19b51a…

MALICIOUS

PDF

29.6 KB Created: 2021-07-19 06:46:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7bea1d29f384a4e3ba6d6abd9f955c6f SHA-1: 2e52c6ae7bf66f24b6983b90c067996e9b46125d SHA-256: 3d6a354aae19b51a09a3c5d9661b72c142fded5bf81f91ba7f6311157813b511
130 Risk Score

Malware Insights

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

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free Robux' or 'game hacks'. The document body, though partially corrupted, also contains similar lures and URLs. This indicates a social engineering attack aimed at tricking users into visiting malicious sites, likely to download further malware or engage in scams.

Machine Learning

  • Nyx PDF Classifier clean score 0.0794

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-survey-game-hack In PDF document text
    • http://kmh.ddnsthailand.com/ckfinder/userfiles/files/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E99 22776 bytes
SHA-256: 0c712399f3f3fefcae3f146246de1667013b2fe51abc8a8f1a1965737aec0c5f
font_01_sfnt_off00005193.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5193 18496 bytes
SHA-256: d3f36d4101fb5e75cf0387f294baf635f0b832cdc5c917c0c18760a2975165f8

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