Malicious PDF — malware analysis report

Static analysis result for SHA-256 d44f3603bb5e9ed1…

MALICIOUS

PDF

46.4 KB Created: 2021-05-14 17:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 28d180029b5568ef0c1d32965f18ec2c SHA-1: b7c8889d1a112cb2221aa134716395b98f31843f SHA-256: d44f3603bb5e9ed13c96162242ee13fe50af7d0c249b0ef44f07b4bde1999c4b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous external links, many of which are SEO-optimized and point to pages promising free Robux or game currency. The presence of an MFA lure suggests an attempt to harvest credentials or session tokens. The document's structure and content indicate it's part of a link farm designed to redirect users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/how-to-get-free-robux-on-roblox-2021-game-hack
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/how-to-get-2021-robux-for-free_GM431946152.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/free-spin-app-coin-master_GM406889139.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/free-robux-with-no-human-verification_GM431946152.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-survey_GM431946152.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/free-robux-working_GM431946152.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/robux-free-gift-card_GM431946152.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/free-spins-coin-master-generator_GM406889139.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/coin-master-spin-free_GM406889139.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/free-spins-in-coin-master-2021_GM406889139.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/free-free-robux_GM431946152.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/coin-master-400-spin-link-today_GM406889139.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/free-robux-human-verification_GM431946152.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-computer_GM431946152.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/download-minecraft-java-edition-free_GM479516143.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/roblox-arsenal-hacks-download_GM431946152.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/free-spins-october-28-2021-coin-master_GM406889139.pdf
    • https://learn.mtsntaput.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bcd.bin
b8ddfaf0a579dae5b88bc6ce2b62bce87a9fcda7c6d2ec6c5b055214857705fa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BCD 25244 bytes
font_01_sfnt_off000084a8.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A8 3884 bytes
font_02_sfnt_off00009150.bin
57ee29ca2df633c9559bea9da81b447a7ef2e0dffb4d388bdd233aaad46b31ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9150 18756 bytes

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