Malicious PDF — malware analysis report

Static analysis result for SHA-256 35f376129f9f83c7…

MALICIOUS

PDF

38.5 KB Created: 2021-05-10 16:39:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3d85e564f5c267cf58c9c35e092dfbcd SHA-1: 89a929c2638053e8ecef3d92779f28edd7ae9721 SHA-256: 35f376129f9f83c7a26d3e91c92c4fc1a8b7528dea9725372cdb2bbb48ddcb6a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a redirector link, specifically pointing to a lure for a 'free generator / game hack'. The embedded URL, https://netcdn.xyz/app/479516143/how-to-get-minecraft-for-free-on-ipad-game-hack, is identified as malicious infrastructure. The document body also contains this URL and a call-to-action phrase, reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/how-to-get-minecraft-for-free-on-ipad-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
font_00_sfnt_off00003382.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3382 24204 bytes
SHA-256: c8ccfdda286ea5f03d74f26a6dc7cff47d7d4152114070d284bb473214088b1e
font_01_sfnt_off00006a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A70 3288 bytes
SHA-256: 9a94fd29766ab16fa830001e5c46849d6d6530bd8db209681d0dcb57fcc492f8
font_02_sfnt_off00007549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7549 18224 bytes
SHA-256: 9e691df568453236f4d0ad162bd2f3ab3ed053816089b7695d089a9ceca8acc7

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