Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf6041ef84d1f09…

MALICIOUS

PDF

38.9 KB Created: 2021-05-12 23:43:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c2d706642946309e39fbb0b475159e24 SHA-1: 71817dba87c91fba74729da5956b49410a6ed2c5 SHA-256: eaf6041ef84d1f098bbe663e711e99b74d40c7f09bfe5181ce4f6f1423e85036
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating it is a lure for a game hack generator, linking to known malicious redirector infrastructure. The document body explicitly mentions 'Coin Master Hack Without Verification Code' and includes a call to action to access a generator. While no scripts were extracted, the embedded URLs and lure text strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-hack-without-verification-code-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_off00003898.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3898 25324 bytes
SHA-256: cbbd518ddef453eaf34258cf83806e4913fe543d2124d78eeac291557c4979d3
font_01_sfnt_off00007339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7339 19516 bytes
SHA-256: 73914ec43b68c2821fbb6ef9746061996f645f3b8857b90e5e51bc82b8cf4242

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