Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d3cf234e31b2b2…

MALICIOUS

PDF

50.4 KB Created: 2021-05-30 23:30:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6e339a8e94a539819e7ea87bef87ef88 SHA-1: 646878b38ab6fb13fdd95ce0b02cf8c56d1a1d98 SHA-256: a6d3cf234e31b2b2b25fdd802194222cc37b25ea0ba31299c3ecb2c26d209106
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a malicious redirector link pointing to a lure for free Robux, which is a common tactic for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8293

Heuristics 3

  • 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/roblox36.com-free-robux-game-hack In PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-views-on-tiktok_GM835599320.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-tiktok-likes-without-verification_GM835599320.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://porownywarkaleasingowa.pl/wp-content/uploads/fsqm-files/free-robux-group_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn extracted file (stream_003_off0000553f.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000553f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x553F 27508 bytes
SHA-256: ed388f57e827a8cac91a80a4d5986cb9d516c04a16c81c73f5cf1e6fb2ee43d2
font_01_sfnt_off00009413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9413 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off0000a0ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0BA 18756 bytes
SHA-256: 75a7293df35b739ae2294dba45007dab7b7658b4df7c6a7e046c10781a1fd260