Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b206e2647208545…

MALICIOUS

PDF

35.9 KB Created: 2021-06-28 22:11:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 10f5390e8c7fd17c9078cec8af137988 SHA-1: 557f7cad5c4d5bbd493943d9c2386fb307d2a264 SHA-256: 1b206e26472085458050fe8648881899f58428e5545ae933d3eb10d233fed147
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 point to external resources related to game cheats and hacks. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content. The document body itself contains URLs that are likely part of a link farm designed to attract users searching for game exploits.

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/shower-simulator-roblox-cheats-game-hack PDF link annotation
    • https://www.iosas.info/uploaded_files/userfiles/files/free-magical-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/get-robux-free-legal_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-robux-generator-2021-robux-hack-no-survey-updated-get_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-make-free-admin-game-roblox_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/roblox-beach-house-roleplay-hack_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/coin-master-hack-xyz-download_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/robloxhackbalance_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/pokemon-go-free-and-nintendo-switch_GM1094591345.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://www.iosas.info/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey-on-tablet_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
stream_002_off00003297.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3297 22964 bytes
SHA-256: b2b2d05b1dfd1513fbcff3f8341d45fcbefeaa87923cc255111d31faa68fd75e
font_01_sfnt_off0000662a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662A 19440 bytes
SHA-256: d17929cbe4eb2d2dcf151805cac798c0ea5548169e9d60801da82356f670bc50