Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a449fccefdd14fd…

MALICIOUS

PDF

36.8 KB Created: 2021-05-12 11:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a572e251478296a551bf8f5c82cf9aa1 SHA-1: b7fa014e611c2c60c76ec77dbc250a4633a15d7d SHA-256: 6a449fccefdd14fdcf07ea1c83b16a5cfd89cbe58b9ab02795b096e77c0d0324
170 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'Coin Master Hack' and a prominent 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' call to action. This link redirects to malicious infrastructure, indicating a phishing or scam attempt. The document's structure and content suggest it's designed to trick users into executing further malicious actions, likely involving a fake CAPTCHA or verification prompt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-hack-apk-android-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_off0000358f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x358F 24984 bytes
SHA-256: 23482da6b57f939193bd7701c1dbe69d50dc3db06606c5b4a8460d5ddc2d0472
font_01_sfnt_off00006f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F1D 18068 bytes
SHA-256: 826b659b6d6a919198e40a4f05f943b2342615ea87152df5852563aa56c598f0

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