Malicious PDF — malware analysis report

Static analysis result for SHA-256 340d2efc7c7be1c6…

MALICIOUS

PDF

34.7 KB Created: 2021-06-20 12:54:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 28f50a83d462a08a182751da78d97190 SHA-1: 8ceb6148c9b9463932b3ea35ecbaec289169ceb5 SHA-256: 340d2efc7c7be1c656ae73fbda6836d85fee4708c8d8d304c67cc3be8abb3de0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of embedded links, many of which are structured as SEO-optimized links pointing to game-related cheats and hacks. The primary URL, http://netcdn.co/app/431946152/free-roblox-codes-2021-december-game-hack, suggests a lure for free in-game items. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, strongly suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier also flagged this PDF with high confidence.

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/free-roblox-codes-2021-december-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/roblox-free-robux-by-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-catalog-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/hack-crack-for-coin-master-currency_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-patch-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-how-to-get-free-robux-and-obc_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/d-day-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-promotinal-codes_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/pubg-hack-uc-20219_GM1330123889.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-free-exe_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-wings_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-way-to-get-p-in-plaza-game-on-roblox_GM431946152.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_off00002de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE3 22768 bytes
SHA-256: 92e9002ff66ef50e8320fe5c303746f5c76cd3f11046e4c9ca2ddccf534c9870
font_01_sfnt_off000060b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B1 19656 bytes
SHA-256: 4b732986ad5ef533bdea110fd52bbea26ccd3e27c06036d6000495a6a703a5cc

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