Malicious PDF — malware analysis report

Static analysis result for SHA-256 adb4078c48684b67…

MALICIOUS

PDF

36.4 KB Created: 2021-05-24 04:03:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 40cea24be06bde183cd1718803d3a50f SHA-1: a0769907f2cde533109bcd271c800fc3c98e2f86 SHA-256: adb4078c48684b67976b680413a8726b56446f98d4d9ab1d21448bf8ffa5f1a3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains, including one identified as malicious infrastructure. The document body and heuristics indicate a lure for 'Coin Master Free Spins' or game hacks, directing users to click a link that likely leads to further malicious content or downloads. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-free-spins-game-hack In PDF document text
    • http://boliviagasenergia.com/images/coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/10-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000034e8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34E8 24908 bytes
SHA-256: 1bddec78643025aa0dc7d8e6767bec95b400491f118ca28acb5a1ec0fb78be67
font_01_sfnt_off00006e5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5A 17884 bytes
SHA-256: 7b855ef2bb944b5b370c61480927ccad63ff31bdbf820bc1f0da9d35a10f5fb2

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