Malicious PDF — malware analysis report

Static analysis result for SHA-256 be4e1ba3c5bc20bb…

MALICIOUS

PDF

45.2 KB Created: 2021-05-15 13:50:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f23272bbc79c9402d39336b8dd327fd7 SHA-1: f9f7e9a68d88c8d2812635d64392c378a7d0101d SHA-256: be4e1ba3c5bc20bb4f0b20d2025d640817bdafee330b17fc922d4bb566b5b764
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to known malicious redirectors, masquerading as 'free generator / game hack' lures. It impersonates Facebook to trick users into clicking the malicious link, which leads to the URL https://netcdn.xyz/app/431946152/free-robux-exe-game-hack. The presence of these lures and the ML classifier's high confidence score indicate a credential phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/free-robux-exe-game-hack.
  • 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/431946152/free-robux-exe-game-hack In PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-coin-master-gold-cards_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46B0 25332 bytes
SHA-256: 83907d52bab7f0e1dd980e53e51d4efef0a65777459ba97d0360b8c8d001665c
font_01_sfnt_off0000815b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815B 4220 bytes
SHA-256: 7dd9553c86b268a66d43bf6513331ab31d3255e944cb85fd35da338caa1139b9
font_02_sfnt_off00008f26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F26 18012 bytes
SHA-256: 1e3fda203f08fe42ab00f6cef97e605bb68f7e374108f28afe3c353055d0c9d6

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