Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb400174c44690f…

MALICIOUS

PDF

30.0 KB Created: 2020-04-11 02:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 403fbfa1d7d48eeb11e50ed6e9709295 SHA-1: a2cdce1d6521c29ba1b6979cd950068fa43cbd73 SHA-256: 9cb400174c44690faedfcc0f67fc5270c5b036302ffafac1f93c4dd6687d97d5
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, many of which point to similarly structured URLs on different domains. This pattern is indicative of a link farm or a mechanism for distributing malicious content. The document body, though heavily obfuscated, contains references to 'Lg oled smart tv manual' and the authoring application 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The primary heuristic 'PDF_SEO_LINK_FARM' strongly supports this assessment, indicating the PDF's purpose is to host a mass of external links.

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://martoraj.com/uploads/1/3/0/4/130476589/130476589.html#lg+oled+smart+tv+manual
    • http://tubegatelatches.com/uploads/1/3/1/4/131437978/d83f6ef36d.pdf
    • http://joncloudinc.com/uploads/1/3/0/6/130639566/74f84f.pdf
    • http://divinegiftsofhealing.com/uploads/1/3/0/6/130604093/2da7f3c.pdf
    • http://nikiclickit.com/uploads/1/3/0/7/130775361/b0f1ec74a6da04.pdf
    • http://linkschecks.com/uploads/1/3/0/3/130323409/341451.pdf
    • http://cdstonemath20d.net/uploads/1/3/1/4/131453603/ruxopar.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_off00004bda.bin
a62a8537feb727874336e76edc2ccdbe4bbc00a288daa7abd65c0df6b029e00b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BDA 8060 bytes

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