Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3dfea07805db818…

MALICIOUS

PDF

35.2 KB Created: 2021-06-25 15:32:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 80bd79dce0b034afe065685c62da2a5d SHA-1: d6be7a0a8f253b155f3d766c3c223f98a6861461 SHA-256: f3dfea07805db8186926fbb116ffd5022eef2d5159192af101218c5570f86562
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, that direct users to external sites offering game hacks and cheats. The presence of a direct download URL and a large number of related PDF links suggests an attempt to lure users into downloading potentially malicious second-stage content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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
  • 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 http://netcdn.co/app/431946152/hack-para-counter-blox-roblox-offensive-download-game-hack PDF link annotation
    • https://au-ma.com/image/data/files/get-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-meep-city-plus-hack_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-robux-without-getting-apps_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-intriga-free_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/robux-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/roblox-cheating-youtube_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/pokemon-go-free-90-fps_GM1094591345.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-unlimited-robux-hack-working-2021_GM431946152.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • https://au-ma.com/image/data/files/coin-master-free-spins-link-today-instagram_GM406889139.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_off000031ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EF 21928 bytes
SHA-256: 3f0e39cdef9cd504a28bc7a08da666fed69d4aab5ecdcbbd17909df246c94c29
font_01_sfnt_off0000625b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 19796 bytes
SHA-256: 7675d98df7a60b49319574df1803f99e7a300b25726afb6c3a46339e364a2e5d

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