Malicious PDF — malware analysis report

Static analysis result for SHA-256 47bdf3080b998baf…

MALICIOUS

PDF

36.4 KB Created: 2020-04-05 16:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c4715ae8e379a6c2c32f9328beb23a5c SHA-1: 4d2f6915444e86be957aae28b592fcd1098a1ca0 SHA-256: 47bdf3080b998bafbd676436328c2d1747da4f23e40229cefda8cf7c07f49993
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, many of which are dynamically generated and point to PDF files on various domains. The document body, though heavily obfuscated, contains text related to 'Roku error code' and the authoring application, suggesting a lure to a fake support page. The heuristic 'PDF_SEO_LINK_FARM' indicates a deliberate attempt to create a link farm, likely for SEO poisoning or to distribute malicious content across multiple domains. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://lapuertadelsolshop.com/uploads/1/3/0/6/130605492/130605492.html#roku+error+code+014.40+iphone
    • http://deidreford.com/uploads/1/3/0/5/130539109/tejebo_jutuzunurara_gudabin_mosigufu.pdf
    • http://hostmaster.fonddulacchurch.com/uploads/1/3/1/1/131163559/loxunosulatogasiles.pdf
    • http://cornyjokeclub.com/uploads/1/3/0/9/130969841/2ddb83.pdf
    • http://apmount.com/uploads/1/3/1/3/131384600/bb23c795f5.pdf
    • http://bestarizonahomesforsale.com/uploads/1/3/0/7/130740374/1325022.pdf
    • http://fortuna-algorithms.com/uploads/1/3/1/4/131406456/6721809.pdf
    • http://bigtopmusicnetwork.com/uploads/1/3/1/3/131381677/lapazasinuzutopir.pdf
    • http://promow.org/uploads/1/3/0/6/130621031/mofaxe_koferope.pdf
    • http://archeylogging.com/uploads/1/3/0/2/130272275/b8e3b10a.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006551.bin
f28b9d0abd5adf13b06c5469d42bd91fdafb130926cfba492284194becefee57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6551 7680 bytes

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