Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a6ea20dc342e49…

MALICIOUS

PDF

37.2 KB Created: 2021-05-15 12:04:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b660b112a975fddc1ec11b2728731da2 SHA-1: e9e960f8cd782d8d1169c3e0ea6acb6d1e484d89 SHA-256: 13a6ea20dc342e49f8009dd95901f7a9a6288a8d65346df411cd421063c8d9bc
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically advertising a 'free Robux generator' or 'game hack'. The heuristic firings confirm these links point to known malicious redirectors. While no scripts were extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead the user to a malicious site.

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/free-robux-apps-that-work-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_off000033eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33EB 24948 bytes
SHA-256: 69e79003121e45e2b3c0f2aaaf3dd3b8796e786c46b410900aaaa466ac5b72ec
font_01_sfnt_off00006d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D91 19056 bytes
SHA-256: 867cc7ed7a05e00a705c8433c5324c57a550f7e7678a2e8c50298e1974253cec

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