Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc735fe0d46da6bf…

MALICIOUS

PDF

41.8 KB Created: 2021-05-12 15:14:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a1dae18ca44a5328879de4e623a288c2 SHA-1: a2a613aaeed508afa583a8337d8bbb30d93bf240 SHA-256: dc735fe0d46da6bfaf32f4fdf914b9053ed22c43238d2256e7695ced12e59024
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs and a link farm, heavily suggesting a phishing or malware distribution attempt. The ML classifier and PDF_SEO_LINK_FARM heuristic strongly indicate malicious intent, likely to redirect users to sites offering game cheats or similar lures. The presence of a download button lure further supports this. The primary IOCs are the external URLs used for redirection.

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/479516143/optifine-mcpe-game-hack
    • http://gomelavto.by/images/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://gomelavto.by/images/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://gomelavto.by/images/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://gomelavto.by/images/coin-master-free-spin-realme-products_GM406889139.pdf
    • http://gomelavto.by/images/real-hack-for-coin-master_GM406889139.pdf
    • http://gomelavto.by/images/80-free-spins-coin-master_GM406889139.pdf
    • http://gomelavto.by/images/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://gomelavto.by/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • http://gomelavto.by/images/real-free-robux-generator_GM431946152.pdf
    • http://gomelavto.by/images/apps-to-get-free-robux_GM431946152.pdf
    • http://gomelavto.by/images/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://gomelavto.by/images/free-robux-2021_GM431946152.pdf
    • http://gomelavto.by/images/free-robux-group-payouts_GM431946152.pdf
    • http://gomelavto.by/images/free-robux-hacker-us_GM431946152.pdf
    • http://gomelavto.by/images/coin-master-free-coins-and-spins-link-2021_GM406889139.pdf
    • http://gomelavto.by/images/roblox-install-free_GM431946152.pdf
    • http://gomelavto.by/images/minecraft-hacked-apk_GM479516143.pdf
    • http://gomelavto.by/images/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • http://gomelavto.by/images/coin-master-free-spin-link-list_GM406889139.pdf
    • http://gomelavto.by/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a01.bin
7daacb94e81074a5899c03f7668ed5be15ed7fb87cc50481393fc8a27cc9ce15		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A01 25292 bytes
font_01_sfnt_off0000838b.bin
4dad5880ad3eacbbc69325eb8667ba1fdf9d8a9d84ebacaad4d0967bdcec7d7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838B 17516 bytes

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