Malicious PDF — malware analysis report

Static analysis result for SHA-256 73c5ca49c18391a2…

MALICIOUS

PDF

39.8 KB Created: 2021-05-14 02:03:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0fc61f388b775711f78fe1cc04992cb8 SHA-1: 0432b76e8534b1c27bdb9583c98dbe138df908b7 SHA-256: 73c5ca49c18391a2fd988d6066d8852f69c0f23e24588568f9ca530a9d6e186a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for a 'Free Robux Hack 2021' and includes a link to malicious redirector infrastructure. The document body text and embedded artifacts suggest a social engineering attempt to drive traffic to a potentially harmful website. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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-hack-2021-game-hack In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003240.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3240 25436 bytes
SHA-256: 913606b61ff4b4280572e5620120e8f13feda15ecfead6b112d11ef105980115
font_01_sfnt_off00006d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9B 3112 bytes
SHA-256: aa1251cb09ed12c218352f13a8acd10e786b8293ab79e6acb90489f3f25529ba
font_02_sfnt_off00007852.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7852 18816 bytes
SHA-256: b2e74e066e927f416452387fe7118a02e4882588ce64a473b0bf6318b488dee0

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