Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed6b12a310e35b4…

MALICIOUS

PDF

36.6 KB Created: 2021-05-13 01:50:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b1da6636122f6a8d939276cb945c548a SHA-1: 3384ce2d2905fbc7c21f8361c2a4e3886608932f SHA-256: 7ed6b12a310e35b42639fd93046c542a6804383320bd62e8fa2b9f7496ae15ca
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a critical heuristic firing for a game hack redirector lure, pointing to a specific URL. This URL is also listed as a malicious redirector link. The document body contains text related to 'Coin Master Links' and a call to action to 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the lure. The presence of these elements strongly suggests an attempt to trick the user into navigating to a malicious site, likely to download further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/coin-master-links-that-don-t-expire-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_off000034a6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34A6 25184 bytes
SHA-256: b347fbfa64f06f5e834f35b246115fb07448ef0addfdd50a282c025122895e00
font_01_sfnt_off00006d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D58 18436 bytes
SHA-256: dce3e1f078114056c7a9f64f23754c2b9e2cd17dc36a219649f8cd9aa09ae054

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