Malicious PDF — malware analysis report

Static analysis result for SHA-256 31a6d6532f6c6f04…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 07:20:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 384b765a594d57e3d49bb8badaced4da SHA-1: 2b1f6e228e4426236e8c97af94198952d092ab97 SHA-256: 31a6d6532f6c6f04732bc0bf4ff72e3142f79c959973a0405423fee664ee4052
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document exhibits characteristics of a lure, presenting numerous links to external resources related to popular games, likely to entice users into downloading further malicious content. The heuristic firings, particularly the PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, strongly indicate malicious intent. The presence of a 'download button' lure further supports this, suggesting the document's purpose is to trick users into executing downloaded files.

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/roblox-jailbreak-play-for-free-online-game-hack PDF link annotation
    • http://smkn1salatiga.sch.id/library/repository/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-outrageous-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-free-boombox-games_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/hacks-for-free-robux-on-roblox-no-human-vertify_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-ez-hacker_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-hack-roblox-jailbreak-xbox-one_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/camisetas-de-roblox-de-hacker_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/cheating-explioting-in-the-condo-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/rich-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/pokemon-go-free-offers_GM1094591345.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-how-to-make-a-free-model_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-hack-2021_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_off00002dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFF 22528 bytes
SHA-256: 58d7b21e191e7899f638a57bc84dce6979e0406b4c5ac638e3119855f575453a
font_01_sfnt_off0000603e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603E 19440 bytes
SHA-256: 726098b8f7f5c1e5fde4b04631db1f6670be4b28ce98666b38841fcf96d99417

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