Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7169e67fbfd38b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 03:42:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 6114c2ed1db278523644e6f2e378dfb4 SHA-1: 1138c7737169c55833d2556426a180541b2b1e0e SHA-256: 9f7169e67fbfd38b0af7326ea0e646cf0fcd0ad4c16dd1e0a0705ad002e7a980
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for 'free Robux' and game hacks, directing users to a known malicious redirector. The document body and heuristics indicate a phishing or scam attempt, likely to lead users to a site that may host further malware or attempt credential harvesting. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.tw/app/431946152/free-robux-real-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-roblox-using-artmoney_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-promotion-codes_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-roblox-strucid-codes_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-and-get-robux-and-vip-no-survey_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-free-champion-shirt_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-pet-snacks-coin-master_GM406889139.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_off000032c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C1 22316 bytes
SHA-256: 443b9a912c86c7444c270778d34d736559102c40fd7ac4f8e9a07eec4487f047
font_01_sfnt_off00006467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6467 18788 bytes
SHA-256: 4bc1fb5241f7d1727492069c2276e888dd2add0fc79522b75a602c51baadbe08

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