Malicious PDF — malware analysis report

Static analysis result for SHA-256 3695a71b558f3b16…

MALICIOUS

PDF

38.2 KB Created: 2021-05-10 17:31:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 69a538dd38309ee1b83b1e7202dba870 SHA-1: 6c90f64332feb62fbb20fa960e74ec8952a5610d SHA-256: 3695a71b558f3b16cef7cb2d9b25f688b56bb0695153ac410e30b270f2519ec9
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free generators, directing users to a URL associated with malicious redirector infrastructure. The embedded URL is designed to entice clicks, likely leading to further malicious content or malware download. No scripts were extracted, but the PDF structure and embedded URL strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0126

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/how-to-get-free-spins-on-coin-master-facebook-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_off000032a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A5 24316 bytes
SHA-256: 1dd925de18da94f58b36efc5f1da127213c81d557db3de33a13768d47c32bcb7
font_01_sfnt_off00006970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6970 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000735b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x735B 18380 bytes
SHA-256: 71bee5fb83ca58b21c1d24b393ac6a95aa3d07cb2aa8ee860216aa324e2c09d6

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