Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebb0fefa8b88c92…

MALICIOUS

PDF

33.4 KB Created: 2021-06-28 21:15:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 35f52ecf67e0c60a64ccd10acb3fa547 SHA-1: b4b11740103efbadf3c6bf5606d3275971218e5d SHA-256: 7ebb0fefa8b88c92735f6ddb4f83743bb1705ff410ebd27959a8d8f0f40637da
220 Risk Score

Malware Insights

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

The PDF document contains numerous links designed to lure users into clicking on what appear to be game hacks and generators, such as for Roblox. These links lead to malicious redirectors and SEO link farms, indicating a phishing or scam attempt. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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-roblox-hats3-game-hack In PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/dbz-final-stand-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-make-sure-your-roblox-account-doesnt-get-hacked_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/hack-para-tener-robux-como-tener-robux-gratis-enderrobux-117_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-free-2021-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/como-conseguir-robux-sin-hacks-en-juegos_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-roblox-work-at-a-pizza-place_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/hacking-a-roblox-hotel-troll-banned_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://stmb-multismart.ac.id/perpustakaan/repository/why-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DB2 21984 bytes
SHA-256: d2d5998b5d9803b7938ad99714311e5f3e783bba4ebc557ed301a04d2ffd8329
font_01_sfnt_off00005d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9E 18928 bytes
SHA-256: aae957e55de23d853cbef558c4f2c6f34e4608c4b704db34bb146de6de04706f

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