Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bbfa4013862a4d6…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 21:01:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d1237f11dcbc39382d21a4236799b22d SHA-1: 9da954c764a4f5112d27bfef1e21c265f75ed55b SHA-256: 9bbfa4013862a4d65de4a905111bd17046c6e2e33403ecf35ca8f30b19a62ce8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs and a "DOC BODY" excerpt that advertises free game cheats and hacks, specifically mentioning Roblox and Coin Master. The presence of a "PDF_SEO_LINK_FARM" heuristic indicates a large number of external links, likely intended to direct users to malicious sites. The ML classifier also flagged this PDF as malicious with high confidence. The overall pattern suggests a phishing or scam attempt to trick users into downloading potentially harmful files or visiting compromised websites.

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-gfx-maker-game-hack PDF link annotation
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-get-free-robux-using-game-guardian_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-tycoon-money-cheat-table_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-free-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-cheat-engine-tablre-and-bypass_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/pokemon-go-free-and-home_GM1094591345.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-robux-really-works-not-youtube_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/coin-master-hack-apk-online_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-shirt-id-free-shipping_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://www.furuihp.com/Public/upload/editorfiles/google-play-coin-master-free-spins_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_off0000324e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324E 21968 bytes
SHA-256: d1ff8904aa25557ff64bd80c5fe5490edd04595967983a88456e7e3b3cfa65f8
font_01_sfnt_off000062bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62BF 19016 bytes
SHA-256: f53f4a7c059b8f2d36a7e82d560ebee5d6560d8bd8297120e30b1aacbde2d764

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