Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffb4acbc9f16aedc…

MALICIOUS

PDF

34.1 KB Created: 2021-05-24 00:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8846a0e5c02140bc388ef3e7f5b5ecb9 SHA-1: 07a52e2c911c04b58ac9f6c625cffb55c40282ff SHA-256: ffb4acbc9f16aedcbee2a49f1f5c76648fc8d2d745b02d00c3696d6d510d5ceb
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link disguised as a game hack generator, which is a common lure for phishing or malware distribution. The embedded URL points to known malicious infrastructure, indicating an attempt to lead the user to a compromised or malicious site. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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/479516143/minecraft-for-chromebook-free-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
font_00_sfnt_off00002d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7B 24184 bytes
SHA-256: b0fad7d31de5f46e00a8d0f2f2dec291d4e506d43d8cd2994400ed48c67a548f
font_01_sfnt_off000063fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FC 18464 bytes
SHA-256: 2a1fd25b60091da4e89f293bc06fa32417487358dc39e20cf321c71e22d0bfdc

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