Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0d8421ab05711ca…

MALICIOUS

PDF

34.2 KB Created: 2021-07-19 02:29:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0d7a4f71feb817ce1faed10b025ddc94 SHA-1: b5d456497c018b6103bdc6d04bc3989a43cb3990 SHA-256: e0d8421ab05711ca69bff59bd7811b84688b61136651dd51311179acc99253f2
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically advertising "free generators" and "game hacks". The primary lure URL is http://netcdn.tw/app/406889139/free-coin-coin-master-game-hack. This pattern suggests the document is designed to trick users into clicking malicious links, likely leading to further malware downloads or scam pages. No scripts were extracted, but the PDF structure and embedded links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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 http://netcdn.tw/app/406889139/free-coin-coin-master-game-hack In PDF document text
    • http://coplaltd.eu/images/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://coplaltd.eu/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://coplaltd.eu/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • https://coplaltd.eu/images/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • https://coplaltd.eu/images/free-100-robux_GM431946152.pdfIn PDF document text
    • https://coplaltd.eu/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://coplaltd.eu/images/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://coplaltd.eu/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://coplaltd.eu/images/free-tiktok-followers-instantly_GM835599320.pdfIn 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
font_00_sfnt_off0000306b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306B 23480 bytes
SHA-256: afca302e4b65403ff7cbc89e3cf7e67417ac60d1d81416b1108526b27726c0e4
font_01_sfnt_off000065a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A2 17712 bytes
SHA-256: effefb876c7a76aa063811ff0160e46fb8a90dd5507c6c48ef6fa39823ab5c8c