Malicious PDF — malware analysis report

Static analysis result for SHA-256 359516bd0246e43e…

MALICIOUS

PDF

34.1 KB Created: 2021-06-22 04:43:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 557658f4d3d152c607eedd492a06faec SHA-1: 1f5b5dae7a8e2a74ee4e5d06dd0e8e07314d79a8 SHA-256: 359516bd0246e43e21a09bcc1ecd60fe5e1978ac874be046ac92f61dc05105d6
142 Risk Score

Malware Insights

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

The PDF document employs a lure of game hacks and free currency to entice users to click on external links. The heuristic 'PDF_SEO_LINK_FARM' indicates that the document contains a large number of links to other PDFs, suggesting a tactic to manipulate search engine results or redirect users to malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple game-related lures points towards a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.co/app/406889139/coin-master-spin-hack-game-hack PDF link annotation
    • https://sensorcamera-tw.com/upload/files/free-roblox-cards-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-twisted-murderer-mvp-hack_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/roblox-free-play_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/robux-hack-no-human-verification_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/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/minecraft-windows-10-free-with-java_GM479516143.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/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/ro-cash-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-free-robux-by-doing-nothing_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/free-robux-codes-2021-march_GM431946152.pdfIn PDF document text
    • https://sensorcamera-tw.com/upload/files/how-to-get-a-refund-on-roblox-2021_GM431946152.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_off00002f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1E 22972 bytes
SHA-256: a4ef3087605c5c98147dbdd50c34b2175d9006246de346e265d0edf1e92639b8
font_01_sfnt_off000062bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BD 18180 bytes
SHA-256: a132cedd825d849e0d721dfbb1ea0ac908be68f445a4640ebf6ea6c953a82746

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