Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f42444c346059be…

MALICIOUS

PDF

45.0 KB Created: 2021-06-11 11:33:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 793712266070fb71741bacb76df4a25b SHA-1: 736bfc868f575450eeb6e687382094ffab986805 SHA-256: 5f42444c346059be5df2460d3cb3300e4257adc2f7101b756a3d78857ccd5b16
160 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors, specifically promoting game hacks and cheats. The primary lure appears to be a 'Roblox Prison Break Cheats' generator, which redirects to the URL https://netcdn.tw/app/431946152/roblox-prison-break-cheats-game-hack. The presence of multiple PDF lures hosted on ciudadata.ec suggests a campaign distributing malicious documents. No scripts were extracted, but the document's structure and embedded links strongly indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-prison-break-cheats-game-hack In PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-followers-on-tiktok-no-verification_GM835599320.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/near-tiktok-free-fire_GM835599320.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/coin-master-hack-ios-no-verification_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/pubg-uc-earning-app-2021_GM1330123889.pdfIn PDF document text
    • https://ciudadata.ec/images/ckfinder/files/free-robux-websites-that-actually-work-2021_GM431946152.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_004_off000050b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B7 25908 bytes
SHA-256: 5bcc80119b7bff187f4190aaffd5f7974e7f6c6c862550e5ebe9404dbb865be1
font_01_sfnt_off00008c0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0D 18728 bytes
SHA-256: f9ab0c75e852c4c69463f251d574ee6fcbaf0a4fbea32cc876db63220f7888fe

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