Malicious PDF — malware analysis report

Static analysis result for SHA-256 61ec702dd6fb05ba…

MALICIOUS

PDF

33.9 KB Created: 2021-06-25 19:30:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2e14b656e24c059f1513619a368959dc SHA-1: d2abb90fe3002aad8e7607fc8919573f43ff9039 SHA-256: 61ec702dd6fb05ba05c5fdbbb201ad6e64d38dc02ebf18c69f79fe0e2da8ccf7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, that lead to websites promising free in-game currency and game hacks. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the structure and embedded links suggest a phishing or scam attempt designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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 http://netcdn.co/app/431946152/how-to-get-free-robux-no-scam.com-game-hack
    • http://www.sbairs.com/datas/files/minecraft-pe-apk_GM479516143.pdf
    • http://www.sbairs.com/datas/files/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdf
    • http://www.sbairs.com/datas/files/coin-master-extra-spins_GM406889139.pdf
    • http://www.sbairs.com/datas/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdf
    • http://www.sbairs.com/datas/files/rbxfree-com-free-robux_GM431946152.pdf
    • http://www.sbairs.com/datas/files/how-to-get-robux-in-roblox-hack_GM431946152.pdf
    • http://www.sbairs.com/datas/files/coin-master-daily-free-spins-link_GM406889139.pdf
    • http://www.sbairs.com/datas/files/how-to-get-free-robux-without-surveys_GM431946152.pdf
    • http://www.sbairs.com/datas/files/gain-robux_GM431946152.pdf
    • http://www.sbairs.com/datas/files/free-robux-generator-no-survey_GM431946152.pdf
    • http://www.sbairs.com/datas/files/minecraft-free-apk-download-016-0_GM479516143.pdf
    • http://www.sbairs.com/datas/files/coin-master-cards-for-free_GM406889139.pdf
    • http://www.sbairs.com/datas/files/coin-master-spin-ml-link_GM406889139.pdf
    • http://www.sbairs.com/datas/files/coin-master-free-spins-link-download-ios_GM406889139.pdf
    • http://www.sbairs.com/datas/files/free-promo-codes-for-roblox-jailbreak-2021-august_GM431946152.pdf
    • http://www.sbairs.com/datas/files/coin-master-free-spins-app-android_GM406889139.pdf
    • http://www.sbairs.com/datas/files/minecraft-java-edition-key-free_GM479516143.pdf
    • http://www.sbairs.com/datas/files/free-robux-no-verification-no-survey_GM431946152.pdf
    • http://www.sbairs.com/datas/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • http://www.sbairs.com/datas/files/how-to-get-100-robux-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003079.bin
d7f267c8267ceeb321938bd6cc463bc9ceb62f9b4db34ed30c0f9067727a780b
pdf-font-stream PDF embedded font (sfnt) at offset 0x3079 22428 bytes
font_01_sfnt_off00006216.bin
eb2976ab10241c13f9ab4b1c9d950ae3897034521f018177045c05c40b2be946
pdf-font-stream PDF embedded font (sfnt) at offset 0x6216 19312 bytes