Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9a78e4f6d233621…

MALICIOUS

PDF

35.9 KB Created: 2021-05-23 14:07:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 38750d6180ef17fbbce31ea1394fe9e2 SHA-1: d68ba62a0c8772f6c9ec0a55877d93c2514568c2 SHA-256: c9a78e4f6d2336214935df2e0e5321df991509116f23c77c1461f132604c86ab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins' for Coin Master. The document body and heuristics indicate a lure to trick users into clicking these links, which likely leads to further malicious activity. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in free in-game items to compromise their systems.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/daily-free-spins-for-coin-master-game-hack In PDF document text
    • http://bpbfloydinc.org/images/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://bpbfloydinc.org/images/free-spins-coin-master-legit_GM406889139.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
font_00_sfnt_off000031c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C1 25228 bytes
SHA-256: 4b993f31cda3cf7af342b407110213ad400c792c306bfcbb7f32aaa4c0a63fa6
font_01_sfnt_off00006b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B02 18308 bytes
SHA-256: b750d5a8b44caccc122b2ff8294eb9307e18e87e3916697a2a7f0c063c77f291

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