Malicious PDF — malware analysis report

Static analysis result for SHA-256 2057616488d8f27d…

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 22:00:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7cb6c88171df33c0eefa42cbd8d2ce12 SHA-1: 7a6c1f2247c5731a6c230d4362bd72b3c11336b4 SHA-256: 2057616488d8f27dbcc1a97802c7cc3d62c3cfe7e9d768d959c7e51df815f85a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links to external websites, many of which are structured as SEO-optimized links for popular games like "Coin Master" and "Roblox". The ML classifier strongly indicated maliciousness, and the presence of a "link farm" heuristic suggests a deliberate attempt to host a large number of potentially malicious or phishing URLs. No scripts were extracted, but the document's structure and embedded links point towards a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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-robux-meme-game-hack
    • http://moto98.com/images/coin-master-spin-hack-trick_GM406889139.pdf
    • http://moto98.com/images/coin-master-free-spins-link-2021-no-verification_GM406889139.pdf
    • http://moto98.com/images/coin-master-hack-apk-link_GM406889139.pdf
    • http://moto98.com/images/free-robux-that-actually-works_GM431946152.pdf
    • http://moto98.com/images/how-to-get-free-robux-codes_GM431946152.pdf
    • http://moto98.com/images/coin-master-50-spin-link_GM406889139.pdf
    • http://moto98.com/images/2021-free-spins-on-coin-master_GM406889139.pdf
    • http://moto98.com/images/coin-master-game-free-spin-download_GM406889139.pdf
    • http://moto98.com/images/hack-coin-master-without-root_GM406889139.pdf
    • http://moto98.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://moto98.com/images/free-robux-no-verification_GM431946152.pdf
    • http://moto98.com/images/free-coins-on-coin-master_GM406889139.pdf
    • http://moto98.com/images/free-spins-coins-coin-master_GM406889139.pdf
    • http://moto98.com/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://moto98.com/images/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://moto98.com/images/free-robux-2021-no-verification_GM431946152.pdf
    • http://moto98.com/images/minecraft-free-download-mobile_GM479516143.pdf
    • http://moto98.com/images/orewards-com-free-robux_GM431946152.pdf
    • http://moto98.com/images/coin-master-hack-online-link_GM406889139.pdf
    • http://moto98.com/images/op-rewards-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000044c8.bin
72e42c49873d458cd26b986cee095dc5a4f3d6349cba140335bf7f67a986440e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x44C8 25308 bytes
font_01_sfnt_off00007f8f.bin
85933b017fd4f47a49c29ca16c8d64906230da484c55266cf0b747b2578ec451
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F8F 3948 bytes
font_02_sfnt_off00008c85.bin
3e6db3c9d7b90636a2057efa50536683edf8623f57b31e837fe721178fdf9957
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C85 18468 bytes