Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3e5683855ae6088…

MALICIOUS

PDF

34.1 KB Created: 2021-07-02 07:35:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 35e3a4e647a69b732e8f431ebe994cd9 SHA-1: 225a84256c350d159342767d401d8730491452f8 SHA-256: f3e5683855ae60884eab73d3e943f271da0c070df9c6c6eb9af0337e3367c88e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a call-to-action phrase, luring users with promises of game hacks and free items. It directs users to a known malicious redirector URL, http://netcdn.co/app/431946152/free-to-wear-straw-hat-roblox-game-hack, which likely leads to a further malicious download or exploit. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-to-wear-straw-hat-roblox-game-hack In PDF document text
    • https://opac.itp.ac.id/repository/tampermonkey-roblox-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-roblox-wings-codes_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/hack-avec-les-code-promo-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-roblox-account-2021-february-2_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-do-i-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-codes-for-roblox-live-now_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-cheat-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-checkmein-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/get-knife-hack-in-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-make-a-private-server-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-customize-roblox-skin_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

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_off00002e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E34 22508 bytes
SHA-256: a7c5a8645225fb5b3119c2d0d839e34a81b9dd402d2b5004c4e91b8f3b3244d9
font_01_sfnt_off00005ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFE 19116 bytes
SHA-256: bf4b1a6eb653f8ea0be6122445de7d86852194ada8e4a224011d34a07bab915e

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