Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f2b0ab8095f549…

MALICIOUS

PDF

37.4 KB Created: 2021-05-11 02:24:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a5db00a23cf41ba16dc4bb1c0d4d10ed SHA-1: 7d2a81a34ad31b54de316d0a46abda618ecb77df SHA-256: 02f2b0ab8095f5492b46e589c089f7ae27a8786771b921bb4c35bdbc43df4176
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a redirector link, specifically disguised as a lure for game hacks and free spins. This link, 'https://netcdn.xyz/app/406889139/free-spins-and-coins-for-coin-master-game-game-hack', is identified as malicious infrastructure. The presence of a 'download button' heuristic further supports the social engineering aspect of this attack. While no scripts were extracted, the overall pattern suggests a phishing or scam attempt designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/406889139/free-spins-and-coins-for-coin-master-game-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
stream_003_off0000363b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x363B 25308 bytes
SHA-256: f51a5b02d6d413fa491e68a720166faee7c5eefd76ef1a299918979a08a02610
font_01_sfnt_off000070e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70E8 18320 bytes
SHA-256: d1cf6b486e789d6a7a281824944966070be141b92be060b449a52bae7023ebff

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