Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bd2688eb7eb4a68…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 00:15:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f4448090b19080d3e3fb3181492785cc SHA-1: 5278bec83c3b244aecbe1f8c10f7b2d8bf240fd3 SHA-256: 5bd2688eb7eb4a6899e298d5614510602e893056f73bd9122d136a0176b76110
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains that are associated with malicious activity, specifically luring users with game-related cheats and free items. The document body and heuristic firings confirm the presence of these lures and malicious redirectors. While no scripts were explicitly extracted, the nature of the links suggests a potential for JavaScript execution or further payload delivery.

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/how-to-get-clohes-for-free-o-roblox-game-hack In PDF document text
    • http://razredna-nastava.net/files/pokemon-go-free-trainer-codes_GM1094591345.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/tiktok-free-online-download_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/como-hackear-cuentas-de-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/roblox-jailbreak-bugatti-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://razredna-nastava.net/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-generator-2021_GM431946152.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_off000030d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D4 22864 bytes
SHA-256: 82e54f9040b89f1506782a336dcb80e73b08631b21014f89c74437fd14bbbf25
font_01_sfnt_off000063c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C0 19084 bytes
SHA-256: 33a248caac50fca8b8ebeca4a5a3d58897b2069b5eedc30a24eb956f8a0efbc2

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