Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8f712824e46e62…

MALICIOUS

PDF

41.8 KB Created: 2021-05-17 07:36:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ea9de7a76c561bfc8afa098684410969 SHA-1: 9a311cec108c03b65b2a795437599ba04bad7438 SHA-256: 0e8f712824e46e62b7c32b22d2ed8335c35677af864a4c2d3b0493a1dc2db2a9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to websites that promise free in-game currency. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. The document body text and embedded links suggest a phishing or scam attempt, likely to steal user credentials or lead them to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-without-verification-game-hack PDF link annotation
    • http://tc-kulmbach.de/images/how-to-get-free-robux-on-android_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/coin-master-hack-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • http://tc-kulmbach.de/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://tc-kulmbach.de/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://collectrobux.coIn 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_off00004755.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4755 24192 bytes
SHA-256: 1f2f2c27d006412ed2c17f9bac5c5f5cc23a176e297a34fabd010981b54f5fce
font_01_sfnt_off00007ee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE1 18964 bytes
SHA-256: 5864977637737ef4e1bd5b7bfc66e5602b8aa3d3ed60f74fb5f96fd63c3aa8ef

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