Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1a42a552c9b12f…

MALICIOUS

PDF

30.9 KB Created: 2021-07-21 19:03:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a285fa6a11147e40716af8d03e7e8766 SHA-1: 445b284885f655fe51a35eea07fefc07876a483b SHA-256: ea1a42a552c9b12fcc8d5d353563c617ace06919a03bb58f523bdd68117a6900
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free Robux generator' which redirects to a known malicious URL. This indicates a phishing or scam attempt designed to trick users into visiting potentially harmful sites. While no scripts were extracted, the embedded URL and the nature of the lure strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0454

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-generator-no-human-verification-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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F6F 23200 bytes
SHA-256: 83545bedcc80f27e9783229686b27f6c2c623e2530280d72071215028b913522
font_01_sfnt_off000053ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53BA 19448 bytes
SHA-256: c4f235c6325a062dfb1dc9d53c980481f8635b4baeb4de16fff816f4c5634972

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