PDF static analysis report

Static analysis result for SHA-256 871b6a35294f437d…

SUSPICIOUS

PDF

39.7 KB Created: 2021-05-10 17:12:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: cb9891bb76f9ce5d736318d5e2eb8710 SHA-1: 6d77c0c085d1fe9d38ebf680056058367474ed5e SHA-256: 871b6a35294f437d57beaf721fa29a6fe0420427840ebf5acf099eff26081fca
52 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as suspicious. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/coin-master-hack-game-download-mod-apk-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000339b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x339B 25320 bytes
SHA-256: 7f14c6283d2d40d7ea6182a9238bf3454e4d819cd6f143bf9c4e3dce3f6bc774
font_01_sfnt_off00006d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D12 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off0000783b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783B 18732 bytes
SHA-256: 3b2a882a3eab689f8cc2f919f0b1382fe93a3de56946d789c538445f453e6892