Malicious PDF — malware analysis report

Static analysis result for SHA-256 478467ad2b1f393c…

MALICIOUS

PDF

46.5 KB Created: 2021-06-01 20:33:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 712694a24195568dada6b8d4ec6e201e SHA-1: 179272ce2bd8e94fc03ddc4dd63e2e976da371ad SHA-256: 478467ad2b1f393ce4c00f3bfd592efb51f2ac3247615bf11b1abb0de5c4efa5
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/hack-roblox-link-mad-city-game-hack PDF link annotation
    • https://zakatiq.com/wp-content/uploads/fsqm-files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/pointsprizes-free-robux_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/911-whats-your-emergency-my-roblox-accout-got-hack_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/how-to-ban-or-kick-in-servers-roblox-hack-scrip_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/free-tiktok-likes-trial_GM835599320.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/free-ninja-suit-roblox_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/how-to-get-free-robux-on-ipad-pro_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/sky-x-roblox-hack_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/como-conseguir-ropa-gratis-en-roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://zakatiq.com/wp-content/uploads/fsqm-files/free-roblox-lvl-7-download_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_off0000531e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x531E 28676 bytes
SHA-256: 493f97dc631fe3240ae8961eb02770e4f05e71a221e08d0c4435f419cfe2d356
font_01_sfnt_off00009118.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9118 18956 bytes
SHA-256: b6662157e201557939797ca5c2d6a2573dc04cc21ec7984878ff1260ea484fdd

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