Malicious PDF — malware analysis report

Static analysis result for SHA-256 3614c59edb702f4a…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 18:58:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b40181e15b704ed57cb92bfd4764a2e1 SHA-1: 9ea85315954bdebcd046e12edd50f3cafa803fd0 SHA-256: 3614c59edb702f4a0d21a764fa1b653a230c38d05c01675075fba876c716689a
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, including one to 'netcdn.tw', which is flagged as a lure for game hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to drive traffic or distribute malicious content. The ML classifier also strongly indicates maliciousness.

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.tw/app/431946152/how-to-get-free-roblox-items-game-hack PDF link annotation
    • http://www.inoxograde.hr/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-a-free-dominus-in-roblox-2021-ipad_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-block-someone-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-hack-points-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.inoxograde.hr/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/coin-master-hacks-free-spins_GM406889139.pdfIn PDF document text
    • http://www.inoxograde.hr/files/minecraft-fly-hack_GM479516143.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_off0000317e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x317E 22708 bytes
SHA-256: 9fc4fca5b5e6daf445f6227bb5d199aae9c488734b947f29886899b0758ccf13
font_01_sfnt_off00006492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6492 19176 bytes
SHA-256: 1bbd74c885478b6da8ac526caf82807791560f3be56a03a53783c17cf6598e07

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