Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08e135ea79ad54c…

MALICIOUS

PDF

38.0 KB Created: 2021-05-30 02:30:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 19e612c7dd8ad7d2219c7a56959adf84 SHA-1: 703a874de1bb0f59da7ea5e87f6233702cb41209 SHA-256: a08e135ea79ad54ccbcc0f511609e9fb8bb964d287141c01c51403e6827d7ecd
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising a 'free generator / game hack' for Minecraft. The document body also contains a call-to-action phrase, 'CLICK HERE TO ACCESS MINECRAFT GENERATOR', further reinforcing the lure. The embedded links likely lead to a second-stage download or exploit. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0155

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-windows-10-free-game-hack In PDF document text
    • https://bulbenko.co.uk/wp-content/uploads/fsqm-files/bloxpink-free-robux_GM431946152.pdfIn 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_002_off00002dd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DD8 25268 bytes
SHA-256: 70dcd8b3776bc4f8f9bdfb344e8e17075c04026cce2ba48bbdb579cb38c9c527
font_01_sfnt_off00006812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6812 2980 bytes
SHA-256: ecd9eba56283e2ee8281dc6f96bbc0cfe627f25b8d17b3346ebabf434e64a48a
font_02_sfnt_off0000725c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725C 18524 bytes
SHA-256: 61f4e129dbb086a6f9797ef369c55cdd3b58d633037fca8f4f59eaf5785788a4

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