Malicious PDF — malware analysis report

Static analysis result for SHA-256 667004eb5acf9746…

MALICIOUS

PDF

51.0 KB Created: 2021-06-03 07:38:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: bea4b6fc828c5e8b5c74d8d92fee0a44 SHA-1: 9ae6daae0b8ef60e9e8e452f573e89aa60fbc969 SHA-256: 667004eb5acf974685e35e0b0509688b406ddbacba9a292e3cf76f029b10500d
142 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9724

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 https://netcdn.online/app/431946152/how-to-hack-roblox-to-get-robux-game-hack PDF link annotation
    • http://artistaone.co/userfiles/files/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/robux-today_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-hack-apk-july-2021_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/www-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-spins-on-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/haktuts-coin-master-free-spin-link_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_off000053b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53B3 30608 bytes
SHA-256: 4ef54f306d8d80e25173ee7f7578f8643c9c34b7d08fc583d3f5b9cabd17150f
font_01_sfnt_off000096e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96E5 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000a38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA38C 18588 bytes
SHA-256: 6723e17a0e3ea7e17da9fa5ee91cb22fe0fa4706a6f3d09ae44dda015c08872b

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