Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c932bc92afb205…

MALICIOUS

PDF

42.9 KB Created: 2021-05-11 19:05:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 520604ca8a9b78416b5637413a0173be SHA-1: df020f0997de1f26e99121e0b50b6f33ca6ba420 SHA-256: e4c932bc92afb20564d835446c4fad63ff2e07f72a7e7bee7b192c06475b6c3b
140 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link impersonating Facebook and offering Coin Master free spins, a common lure for credential phishing. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest it is designed to lead the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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/406889139/free-spins-coin-master-site-www.quora.com-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/406889139/free-spins-coin-master-site-www.quora.com-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-change-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-account-reddit_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-spin-coin-master-2021_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_003_off00004acd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACD 24516 bytes
SHA-256: 44d7130d4ce7b2eee16b2a5018bc323225b2208aaa9f71c1dd6b09331e3096e6
font_01_sfnt_off00008376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8376 18884 bytes
SHA-256: bb00696f4b16c794428e45170a4ccec074263e1d5dc5fc7380943e32f5bacec9

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