Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f231467e2620179…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 09:55:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a423a97c7ca4aced3f2bc8efac066279 SHA-1: 540cb1f87c5e00abe51d4426a48cb0303ec08de6 SHA-256: 7f231467e26201798e583857746422191e37491b06be7cc88474f1813117c91f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes hacking Roblox accounts and obtaining free Robux. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The presence of these links and the deceptive content indicate a phishing or malware distribution attempt.

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/how-to-hack-roblox-accouns-game-hack PDF link annotation
    • http://library.sdkmaterdei.sch.id/repository/gain-blox-2021-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-items-in-roblox-using-toy-codes-works_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-robux-gameguardian_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/cool-roblox-outfits-for-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/tweakbox-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/hack-robux-with-no-gift-card_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/como-hackear-dragon-ball-fury-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/robux-free-hair-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-cheat-codes-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/cowboy-t-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/irobux-fun-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-into-robloxs-top-model_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/free-robux-without-verification-and-survey_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-get-free-robux-on-laptop-easy-2021_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/como-hackear-una-cuenta-de-roblox_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/how-to-hack-robux-in-1-min_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/get-free-roblox-by-playi_GM431946152.pdfIn PDF document text
    • http://library.sdkmaterdei.sch.id/repository/roblox-dance-your-blox-off-cheats-to-get-points_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5C 22820 bytes
SHA-256: ab42f1e37cfb818165422865aa8b24ad368d72dca98f79871d5ba790d6b6ddcc
font_01_sfnt_off0000625e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 18960 bytes
SHA-256: 2d82568542c9c745cb31bc7af4c57c52912caf496be66484b88ec823ac1dc49e

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