Malicious PDF — malware analysis report

Static analysis result for SHA-256 b214bb03bf330ca1…

MALICIOUS

PDF

47.3 KB Created: 2021-06-13 16:00:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 52fac05f39502546a1f81679209588bf SHA-1: aaf70fa4c277260a5d2ae7b467c02e4a23307017 SHA-256: b214bb03bf330ca1102476ee999f27a1b2bab35e36c21e1861a7e731fbffc30c
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple embedded links that redirect to a malicious domain, masquerading as a 'free generator / game hack'. This lure is associated with brand impersonation, specifically PayPal, indicating a credential phishing attempt. The presence of multiple redirector links and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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: http://netcdn.co/app/431946152/free-robux-appvaley-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 http://netcdn.co/app/431946152/free-robux-appvaley-game-hack In PDF document text
    • http://library.acehresearch.org/repository/robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-fire_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/awesome-free-accesories-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-free-c_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-make-your-avatar-really-small-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-tower-defense-hacked_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-cheat-engine-access-violation_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-mod-apk-unlimited-spins_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f0a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F0A 25504 bytes
SHA-256: 3289392ac1155e39dc1ec1714a4316646217dfe1b7912018ffb23e0736360d63
font_01_sfnt_off00008a65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A65 2880 bytes
SHA-256: 106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081
font_02_sfnt_off00009456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9456 18788 bytes
SHA-256: 2f6d1a5e919bc55b472eb699998305948b2c8abbf7cef35e7775fe86ffad41ba

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