Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0d16bf1c6596df…

MALICIOUS

PDF

34.1 KB Created: 2021-06-20 16:24:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5c3da7d6eb9c4d2cc08c4e9c88717232 SHA-1: bd1811e73373db075232dd28fbab9c6bc38d36b5 SHA-256: 4f0d16bf1c6596df0f8bae026639842aaae1c447d7ed941f30c2c157a3704a3e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document body and extracted URLs indicate a lure for game-related cheats and virtual currency, a common social engineering tactic. The PDF contains a large number of external links, suggesting a link farm designed to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious workflow, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/get-free-robux-2021-game-hack PDF link annotation
    • http://parsbaft.com/images/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/free-gift-cards-robux-codes-no-survey_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-jailbreak-best-teleport-hack_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/roblox-how-to-buy-items-for-free_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/how-to-cheat-to-the-end-of-any-roblox-obby_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/how-to-get-robux-without-getting-hacked_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/free-fire-roblox_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-level-4_GM406889139.pdfIn PDF document text
    • http://parsbaft.com/images/assassin-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://parsbaft.com/images/coin-master-free-spins-link-ios_GM406889139.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
font_00_sfnt_off00002f42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F42 21892 bytes
SHA-256: 92d4990b2f3a15c41ba5e535c4a8e312d601e278a1dba4723abf50ae0933a6f5
font_01_sfnt_off00005f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 19224 bytes
SHA-256: 821bcaeb5baca65cbb25255ca6205972482cf4d6c0082e9a42268983cc7c06a1

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