Malicious PDF — malware analysis report

Static analysis result for SHA-256 2091e93e60faee72…

MALICIOUS

PDF

44.1 KB Created: 2021-06-01 03:34:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7396c8c08c3465582d9de6ce849b3246 SHA-1: 2356523531b6c7f07c71f73346edd870d164dff4 SHA-256: 2091e93e60faee7297d5b0c6cf6ee085d3380f60f0f227631e0a7b0d4f5d078e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to free game items, specifically Roblox accounts and hacks, to entice users. It contains multiple links to known malicious redirectors and external URLs, suggesting an attempt to lead users to potentially harmful websites. The ML classifier also flagged this PDF as malicious, reinforcing the suspicious nature of its content and links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.xyz/app/431946152/free-roblox-accounts-june-2021-game-hack In PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/v3rmillion-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-buying-anything_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/robux-hack-download-google-chrome_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-tiktok-views_GM835599320.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-money-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-robux-glitch-july-2021_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/how-to-hack-diamonds-in-royale-high-roblox_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-roblox-card-code-generator-download_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/free-roblox-bubble-gum-simulator-accounts_GM431946152.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • https://sktc.se/wp-content/uploads/fsqm-files/robux-free-co_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
stream_004_off00005222.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5222 24120 bytes
SHA-256: 80ba6144a9697f090484040a8f12b6450a9da30a9513ff371fe5e60ebc8fc690
font_01_sfnt_off00008814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8814 18760 bytes
SHA-256: ebe18ac5ffe7e11012f688448806bc85152fcfc75e510305ecd2598303f27e35

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