Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3982ee1befa3b24…

MALICIOUS

PDF

51.8 KB Created: 2021-06-04 01:53:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 37ee02313e8b5e28726a723767b589d1 SHA-1: 9b4fd1c1fef20cb90023b44259e2a84554ffe8ef SHA-256: f3982ee1befa3b244991e072978b5535a8f0c720b021549b826184be41835f85
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are disguised as PDF files related to game hacks and free currency generators. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm or SEO manipulation tactic. The primary lure URL, 'https://netcdn.online/app/431946152/how-to-get-free-robux-without-verification-or-surveys-game-hack', directly promises free Robux, a common lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9464

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-get-free-robux-without-verification-or-surveys-game-hack PDF link annotation
    • http://library-fkip.uho.ac.id/repository/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins-link-31-march-2021_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/20210-pubg-uc-in-rupees_GM1330123889.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://library-fkip.uho.ac.id/repository/pubg-uc-free-in-pakistan_GM1330123889.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_off0000532e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x532E 32532 bytes
SHA-256: dbddfb40a0bfdc23d015b7cf02fe22c4014a8721aaf5a31ec33ecd46f0726725
font_01_sfnt_off00009af0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF0 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off0000a4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4A3 19424 bytes
SHA-256: 30551668946d9b3d80fdd5a427c07e5f2c52faec585ae3c44dbbbd4d67cc7463

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