Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4e6c80b1d8016d2…

MALICIOUS

PDF

33.5 KB Created: 2021-07-20 08:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 411198c2fc9f774abca9202542c31d8b SHA-1: 9a4485641c74b92bd6e88712cee0cbd2bfaabe0b SHA-256: d4e6c80b1d8016d27604d3b446e428ae1a4adc1a19c4b24ba791caff521f71b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, disguised as free game resources. The primary lure is for 'Coin Master' free spins, directing users to http://netcdn.tw/app/406889139/coin-master-15-free-spin-link-of-last-5-days-game-hack. The document body and embedded URLs suggest a phishing or scam campaign aimed at users seeking in-game advantages. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/coin-master-15-free-spin-link-of-last-5-days-game-hack In PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://e-learningmin7jakarta.com/__statics/gudangsoal/files/free-spins-and-coins-on-coin-master_GM406889139.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
stream_002_off00002c6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C6E 22900 bytes
SHA-256: 3394302b0cdab6c0a0bebec08fca1826e3e348fb3b70938d26e3ecb529e7d1ed
font_01_sfnt_off00005fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBB 18644 bytes
SHA-256: 4144dbe1534d0325d37e4c6129895ddb34a2bc26123e242025982d4ceef1bd2b

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