Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8537d696b23d5c4…

MALICIOUS

PDF

33.0 KB Created: 2021-07-05 05:16:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: de5b84fba3f7766ba3723c1e9387665b SHA-1: daf58e640e6de0818b6b30eb9ec1587be131d817 SHA-256: b8537d696b23d5c44cd90b8585634da1872657f5a956a6fe0d8c9a15d1302339
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/835599320/tiktok-fans-for-free-game-hack PDF link annotation
    • https://sensorcamera-tw.com/upload/files/bugmenot-roblox-free_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-legitimately-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/earn-robux-com_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-hack-account-bugmenot-wiki_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-hack-linkmon99-roblox-account_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-any-roblox-item-for-free_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/play-roblox-free-online_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-com-free_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-tiktok-likes-without-verification_GM835599320.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
font_00_sfnt_off00002dc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC6 22260 bytes
SHA-256: 492b5052efa9c844863c6ee5f8241715ab1a3e8c6cfc2ea3e9d2bd0b4a21a450
font_01_sfnt_off00005f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0D 17972 bytes
SHA-256: 635089bb0a2dda3b90a25983121ccb3da5acc2e65406b6e599c0c265bf0918e0

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