Malicious PDF — malware analysis report

Static analysis result for SHA-256 f685d6abd6065d0f…

MALICIOUS

PDF

42.7 KB Created: 2021-06-09 12:11:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 03f425c901b3f8350bd93678537a9979 SHA-1: a3f59bc9808d34e2e9c31f1f2fded1e608a99a30 SHA-256: f685d6abd6065d0f3fcd04d53be1f318d238ce10d5cdf5da5d97234b6de68451
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link disguised as a 'game hack' generator, which is a common lure for phishing or malware distribution. This link redirects to a known malicious infrastructure. While no scripts were extracted, the presence of a malicious redirector and the lure strongly suggest an attempt to lead the user to a site that will likely host a malicious payload or initiate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0285

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.tw/app/431946152/roblox-hacks-ohne-viren-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00003b24.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3B24 26984 bytes
SHA-256: 7d28a874dc3515f5930ee1f236a63609bf952ea3a60250faf2aace640df7757d
font_01_sfnt_off00007a5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5A 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00008469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8469 18600 bytes
SHA-256: 37be179687da6c12f1ac96e1ce5f848e98f9ae0b35451cd76853d1f57163c9bc

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