Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82a289d087a23f5…

MALICIOUS

PDF

35.1 KB Created: 2021-05-11 02:22:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a41803dd37a1a59fa8565072acdbd2a6 SHA-1: d08fd56a7aaa1df20971725188fad13e8a8dd769 SHA-256: c82a289d087a23f53716916188c681733c1bb2c05b380d51efc1afd833ee71bb
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious link disguised as a lure for game hacks and free generators, which is a common social engineering tactic. The link points to known malicious redirector infrastructure. The document body also contains a call-to-action phrase, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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-generate-free-coin-master-spin-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_off0000324f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324F 23784 bytes
SHA-256: 3bc812113d4bc1e8b34e321847f24e00467e62548cb7a4afe432d7bd985515db
font_01_sfnt_off0000686b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686B 18052 bytes
SHA-256: bc7397b7892e84f8f438cdf02f94402a75785e8c4a68cee0805b100b0e31cd84