Malicious PDF — malware analysis report

Static analysis result for SHA-256 a00536e7549c4490…

MALICIOUS

PDF

41.6 KB Created: 2021-05-19 03:01:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6a9243b6542a63a3e9828b63277c041f SHA-1: 5367b7da6ed5025bf5b4cfd7e7b2fd2fc7fe2110 SHA-256: a00536e7549c4490c2d7a21a5d68495be248e31c40d519111a8d49dd83015a72
102 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files, indicating a link farm or SEO spam tactic. The ML classifier also flagged this PDF as malicious with high confidence. The document body contains a lure related to 'Pokemon Go' and a download call-to-action, suggesting a phishing or scam attempt.

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/1094591345/pokemon-go-free-quest-guide-game-hack PDF link annotation
    • https://www.ausecus.com/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/how-to-earn-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/com-roblox_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-free-spins-link-june-2021_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/stock-speed-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-free_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000485b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x485B 24168 bytes
SHA-256: dc784ee61c5172faa8b19a6701c3a1f9cb313092fc1b9504ef145edc72bf1dc6
font_01_sfnt_off00007f79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F79 18536 bytes
SHA-256: a62ac75b2cb375cec34fefaceb82ebb90241a8913d3815f6db59aeb53ec458cf

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