Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e39c13a2ea1a53…

MALICIOUS

PDF

44.9 KB Created: 2021-05-13 06:34:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 25c381a7c8493f1468c9ccb642b1df49 SHA-1: dff0b3d0018ceeaac7f68bd3d7f5f09883cc151a SHA-256: 32e39c13a2ea1a5339c4994177d7c5cc7b7dfbbbde362f54175f6641232ed6b7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and currency. The presence of a critical heuristic firing for PDF_SEO_LINK_FARM and a high ML classification strongly indicates malicious intent. The document body and extracted URLs suggest a lure for free in-game currency, likely leading to phishing or malware distribution.

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 https://netcdn.xyz/app/431946152/funblox.xyz-free-robux-game-hack PDF link annotation
    • http://columbuscigar.com/images/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/earn-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/master-coin-free_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/easy-robux-hack_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-game_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/rbx-sites_GM431946152.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://columbuscigar.com/images/free-robux-generator-2021-no-human-verification-or-survey_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_003_off00004c33.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C33 27912 bytes
SHA-256: 0ff380085e3884071e95f3651daff4bc4128b0909fded3bcdf8cb433f362dfcc
font_01_sfnt_off00008cd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD4 18416 bytes
SHA-256: 094e3ad3acb05c69538296255af77c281e929786c4e47907665e7e86d1bfa11c

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