Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba0b845986c8b857…

MALICIOUS

PDF

40.9 KB Created: 2021-05-17 04:07:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 801678ef26e50dd92da50bf90c8ce69e SHA-1: b808c71b76c06b69abffcd34964010dc5aa19518 SHA-256: ba0b845986c8b8573653a0175d6360ad43c8f788d620756bd2a22e69200efa72
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to lure users into downloading potentially unwanted or malicious tools. The presence of a direct download URL further supports this malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or social engineering attack.

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/406889139/download-coin-master-hack-tool-v1-9-game-hack
    • http://aviaprofsoyuz.info/images/2021-free-spins-coin-master-link_GM406889139.pdf
    • http://aviaprofsoyuz.info/images/free-robux-without-human-verification-real_GM431946152.pdf
    • http://aviaprofsoyuz.info/images/how-to-get-free-robux-on-iphone_GM431946152.pdf
    • http://aviaprofsoyuz.info/images/robux-generator-no-human-verification-or-survey_GM431946152.pdf
    • http://aviaprofsoyuz.info/images/free-robux-2021_GM431946152.pdf
    • http://aviaprofsoyuz.info/images/robux-hack-free-robux_GM431946152.pdf
    • http://aviaprofsoyuz.info/images/coin-master-free-spins-daily-2021_GM406889139.pdf
    • http://aviaprofsoyuz.info/images/como-descargar-coin-master-hackeado_GM406889139.pdf
    • http://aviaprofsoyuz.info/images/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://aviaprofsoyuz.info/images/roblox-devil_GM431946152.pdf
    • http://aviaprofsoyuz.info/images/coin-master-daily-free-spins-link_GM406889139.pdf
    • http://aviaprofsoyuz.info/images/coin-master-hack-no-human-verification-2021_GM406889139.pdf
    • http://aviaprofsoyuz.info/images/free-minecraft-printables-food-labels_GM479516143.pdf
    • http://aviaprofsoyuz.info/images/how-to-use-redstone_GM479516143.pdf
    • http://aviaprofsoyuz.info/images/toolbox-premium-apk_GM479516143.pdf
    • http://aviaprofsoyuz.info/images/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdf
    • http://aviaprofsoyuz.info/images/coin-master-hack-download-android_GM406889139.pdf
    • http://aviaprofsoyuz.info/images/instant-free-spins-coin-master_GM406889139.pdf
    • http://aviaprofsoyuz.info/images/free-hacks-for-coin-master_GM406889139.pdf
    • http://aviaprofsoyuz.info/images/coin-master-pc-game-free-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000474f.bin
bdb2d4cc98e9d386aee6a2739f02222591d40ddb4086bf6c3116bb314441d9e8
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x474F 23380 bytes
font_01_sfnt_off00007bd5.bin
d3737c6cf9fd63f63d0fb032ca99fcdeafd417f1b9a8644db5f60105982db781
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD5 18700 bytes