Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecacda4b83ba09dc…

MALICIOUS

PDF

40.0 KB Created: 2021-05-11 16:50:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f6d8e4023e54bfb92d6882b959c75877 SHA-1: 6aa128707676c9f72dee57c5d99eba186ab01999 SHA-256: ecacda4b83ba09dc197c829e0108d7c6eb79c45461926c480bb05bb8dd46b654
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a malicious URL. The document body also contains a call-to-action button and the malicious URL, reinforcing the lure. While no scripts were extracted, the embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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-minecraft-for-free-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_003_off000037d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37D1 25684 bytes
SHA-256: 5b7e36047d94a248f21c6675543f4631df4462c142575fc2bbed6ca9f548fd06
font_01_sfnt_off000072ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AC 2824 bytes
SHA-256: 61b3a573627d4f03d30684157e1627da3b4499cefab0fdf17b45999135b0250b
font_02_sfnt_off00007c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C53 17872 bytes
SHA-256: 34f4f209811985126907d7d3a0424133b48c05c486b67c85b9a962c5d68635fe

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