Malicious PDF — malware analysis report

Static analysis result for SHA-256 7db47dafd35b48bf…

MALICIOUS

PDF

44.8 KB Created: 2021-06-08 10:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 18e67115630f83276355f6cad8866691 SHA-1: b8f64cf38a9d365630c1bf49033db289528e8bb6 SHA-256: 7db47dafd35b48bf4bbb9985ba41f4a1b2f857993a0f70bbef83d1cc3e91aca7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that form a link farm, primarily luring users with promises of game hacks and in-game currency. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a call-to-action phrase further supports a phishing or malware distribution attempt. No scripts were extracted, but the overall structure and content point to a social engineering tactic to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-roblox-game-hack
    • http://e-pustaka.stkipadzkia.ac.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-reddit_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/pubg-uc-50-tl_GM1330123889.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/hack-coin-master-link_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/hack-card-collection-coin-master_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/how-to-get-minecraft-for-free-on-android_GM479516143.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-hack-2021_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-links-coin-master_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-robux-working_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-online-spins-coin-master_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/coin-master-2021-free-spins-link-2021_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-zone-free-robux_GM431946152.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/free-games-like-coin-master_GM406889139.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/minecraft-bedrock-edition-pc-download-free_GM479516143.pdf
    • http://e-pustaka.stkipadzkia.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053cc.bin
ddd893f83e4aceaf36cdececc0d1e7d9605998f0f7c48ce9c6800b95c91c33f4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53CC 25056 bytes
font_01_sfnt_off00008d6a.bin
abd46f863f925739c6779ba87e0350ce04166d926cbd983fd5dc50e2b294e41e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6A 17948 bytes

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