Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06989865e3a7bb6…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 22:11:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4f499bcbbee96ee207969dfd3ed7cf8b SHA-1: 7c6545c363eb786af0b9ac51e38e693a81443f1f SHA-256: a06989865e3a7bb6d486e9819f22390ceeeda7c1e7fb1d89f2baa1d2c5fbd110
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a 'link farm' by heuristics, directing users to websites that promise free game currency or accounts. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'download button' lure further supports a phishing or scam intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious campaign designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/free-roblox-accounts-2021-with-robux-game-hack
    • https://studiodegaetano.it/images/roblox-free-pets_GM431946152.pdf
    • https://studiodegaetano.it/images/coin-master-free-food_GM406889139.pdf
    • https://studiodegaetano.it/images/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdf
    • https://studiodegaetano.it/images/coin-master-game-hacking-tricks_GM406889139.pdf
    • https://studiodegaetano.it/images/coin-master-2021-free-spins-link-2021_GM406889139.pdf
    • https://studiodegaetano.it/images/coin-master-hack-tool-for-pc_GM406889139.pdf
    • https://studiodegaetano.it/images/latest-free-spin-coin-master-daily_GM406889139.pdf
    • https://studiodegaetano.it/images/coin-master-hack-version-2021_GM406889139.pdf
    • https://studiodegaetano.it/images/irobux-com-redeem_GM431946152.pdf
    • https://studiodegaetano.it/images/roblox-fun-com-free-robux_GM431946152.pdf
    • https://studiodegaetano.it/images/free-robux-generator-2021-no-survey_GM431946152.pdf
    • https://studiodegaetano.it/images/coin-master-daily-rewards_GM406889139.pdf
    • https://studiodegaetano.it/images/free-coins-coin-master-daily_GM406889139.pdf
    • https://studiodegaetano.it/images/how-to-earn-robux-on-roblox_GM431946152.pdf
    • https://studiodegaetano.it/images/free-spin-coin-master-hacktoman_GM406889139.pdf
    • https://studiodegaetano.it/images/coin-master-cards-free-cards_GM406889139.pdf
    • https://studiodegaetano.it/images/coin-master-app-for-free-spins_GM406889139.pdf
    • https://studiodegaetano.it/images/how-to-get-free-snacks-in-coin-master_GM406889139.pdf
    • https://studiodegaetano.it/images/roblox-fun-com-robux_GM431946152.pdf
    • https://studiodegaetano.it/images/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004975.bin
47ca13e887cd49eb3681f7f0cae7103b0a1564fb4d7daed0b2dfe3d304b66428
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4975 24604 bytes
font_01_sfnt_off00008222.bin
a3899638bf51e335cbc40673d1471e0832e9a39f88469ef4ed0809ba61e6f618
pdf-font-stream PDF embedded font (sfnt) at offset 0x8222 19076 bytes