Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6ee6f88f5b9d69…

MALICIOUS

PDF

44.1 KB Created: 2021-05-31 00:08:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a504fc6b446283eab6fb9e963bc344a1 SHA-1: 538f00a2ac63b6ad7443f11259acc2af44ffc21f SHA-256: cf6ee6f88f5b9d6940efcd9eb085e299671ad5e133034a1844634707a719d557
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9463

Heuristics 4

  • 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/free-robux-website-game-hack PDF link annotation
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://zbych-pol.pl/wp-content/uploads/fsqm-files/is-minecraft-education-edition-free_GM479516143.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_003_off00004f4e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F4E 25096 bytes
SHA-256: afb9d4ae61a7e99309da46af777f763ecd1185473189096cc2b0667519285315
font_01_sfnt_off000088ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88AC 18436 bytes
SHA-256: 681a9996b59f8391b7cc91011c49ef4e68754eb5dc3ad8da1029f3e9c8ab03b4