Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f6b089cea26089…

MALICIOUS

PDF

47.5 KB Created: 2021-05-11 06:32:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: aabf9f13ebd55411afef659639f5fbef SHA-1: ff129d445ebd1b7130544d5ddcb75ae879ab3043 SHA-256: 16f6b089cea260891e5804f3cffc99393c01f855b196432faf6561986a500d3a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to distribute malicious content or facilitate scams. One critical heuristic identified a link to known malicious redirector infrastructure, specifically pointing to 'blox.page-free-robux-game-hack'. The document body also contains references to 'free robux' and 'game hack', suggesting a lure for users seeking in-game currency or cheats, which is a common phishing tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/blox.page-free-robux-game-hack In PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/rbx-earn_GM431946152.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/rewardex-robux_GM431946152.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/what-is-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/get-robux-com_GM431946152.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/free-shields-coin-master_GM406889139.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.e-learning-man19jakarta.com/__statics/gudangsoal/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ba8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BA8 26728 bytes
SHA-256: 78a5779e808759754a00e2fb08e67204d613b5d0702db9f74218bd96b4989ebe
font_01_sfnt_off00008962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8962 3464 bytes
SHA-256: 8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20
font_02_sfnt_off00009598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9598 18848 bytes
SHA-256: 477bf2ef93abdd264292ffad6df1a1b97b65e35661cdcc3b49278aa82d19b07c

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