Malicious PDF — malware analysis report

Static analysis result for SHA-256 0057296d2bec1313…

MALICIOUS

PDF

42.1 KB Created: 2021-06-10 18:17:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8f6c90849d807a00c7c56663031287d1 SHA-1: 010c9896199fb077e7986c436c63fde5dfdd5318 SHA-256: 0057296d2bec131320615004ee6be9245a9e6281d179127282a739386eb318ea
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to pages offering 'free Robux' or game currency. The ML classifier strongly indicated maliciousness, and the embedded URLs suggest a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure and link farm indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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
  • 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.tw/app/431946152/how-to-get-free-robux-code-easy-free-robux-codes-game-hack
    • http://perpustakaan.sman2bondowoso.sch.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/demon-roblox_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/hack-coins-in-coin-master_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-without-any-verification_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-coins-and-spins-today_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/can-u-earn-free-robux-in-roblox_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/can-pokemon-go-free-incense_GM1094591345.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/proprofs-free-robux_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/give-free-robux_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/gaming-dunia-coin-master-free-spins_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-spins-generated-from-coin-master_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-cards-link_GM406889139.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/minecraft-free-download-mac_GM479516143.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/free-robux-hacker-us_GM431946152.pdf
    • http://perpustakaan.sman2bondowoso.sch.id/repository/coin-master-free-spin-app-iphone_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058e4.bin
4214989410f0097727489fa2d42cc3a50251b47f9268a1c486a3e9d6f87a5a36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E4 25696 bytes

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