Malicious PDF — malware analysis report

Static analysis result for SHA-256 81cb573aada38ee1…

MALICIOUS

PDF

35.2 KB Created: 2021-06-29 03:11:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 660550e5cc4e6e7d2baf54ca4293b7a4 SHA-1: f9bab3e473a5bab6e2345051a888a377513f36d6 SHA-256: 81cb573aada38ee1d82d1e1d6379458018470403a2bbdadddd56265af8bcad96
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document contains numerous links designed to lure users into clicking on "free generator / game hack" lures. The primary link directs to a known malicious redirector infrastructure, which likely serves as a gateway to further malicious content or exploits. The document body and heuristics indicate a focus on gaming-related scams, suggesting a phishing or social engineering attack aimed at users seeking in-game advantages.

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/roblox-lumber-tycoon-2-teleport-hack-game-hack In PDF document text
    • http://dottgagliardi.com/images/speed-hack-roblox-download-free_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/watch-ads-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/hack-roblox-blob-simulator_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/roblox-escape-game-cheat_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/roblox-speed-hack-download-jailbreak_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/hacking-roblox-by-hacking-roblox-by-zia-lets-play_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/how-to-hack-values-roblox_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/free-robux-no-deals_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://dottgagliardi.com/images/free-robux-no-download-no-verification_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/roblox-hack-get-free-robuxs-no-download_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/free-robux-generator-no-verification-required_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/how-to-hack-roblox-on-kindle-fire_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/seniac-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/javascript-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/how-to-play-games-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/how-do-i-get-robux-for-free-but-i_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/best-free-robux-websites_GM431946152.pdfIn PDF document text
    • http://dottgagliardi.com/images/best-way-to-make-free-robux-2021-without-verification_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_off000030be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BE 22436 bytes
SHA-256: 12a0bc70ff5e3ab862c76e007a9cbdea91740a78ec11569723bcfd6bbd1d72a6
font_01_sfnt_off000062b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B3 19640 bytes
SHA-256: baa5b9f6a9853aad731d87db014edaa20fdf2fa9d3fc326b27569f1335546d62

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