Malicious PDF — malware analysis report

Static analysis result for SHA-256 a25a9202458d8407…

MALICIOUS

PDF

43.2 KB Created: 2021-05-14 03:55:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a198deccca0290c5de2e5f331926b49c SHA-1: cf33caf818d40c7e43aeed278ad8be4ddc94f60d SHA-256: a25a9202458d8407ea9d483bb13e439931623e929fa001a1d261f7b0795da738
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites that are flagged as malicious redirectors, specifically advertising game hacks and generators. The document body also contains similar URLs, reinforcing the lure. The presence of these malicious links and the ML classifier's high confidence score indicate a high likelihood of this document being used to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/minecraft-pe-apk-download-game-hack In PDF document text
    • http://deyuan-pc.com.tw/images/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/robux-giver_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/sb-game-hacker-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/roblox-cp_GM431946152.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-hack-tool-exe_GM406889139.pdfIn PDF document text
    • http://deyuan-pc.com.tw/images/coin-master-hack-cheat-generator-coins-and-spins-unlimited_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
stream_003_off00004b97.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B97 25300 bytes
SHA-256: 39de6db5138b79e2e6fc48f8208dcf871f806404f8dd019facb4b097604a3c1b
font_01_sfnt_off00008510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8510 18788 bytes
SHA-256: 8791d3cc95b23c4b4e10828445a3a5a1b9cddfea01917aff66a6701f48000f7b

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