Malicious PDF — malware analysis report

Static analysis result for SHA-256 be32d69521c7ac94…

MALICIOUS

PDF

46.2 KB Created: 2020-04-18 17:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7a4be5841629cfe2a4dca0243fe20186 SHA-1: ead75e157468a3735e0c3dfea69a0f908aefbde4 SHA-256: be32d69521c7ac94d1d3077f1959d6e1916b54bbd4f0f3e2d3f1a1351523149e
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are dynamically generated and point to other PDF files. The document body text, though heavily obfuscated, contains the phrase 'software plagiarism checker free' and an embedded URL, suggesting a lure to a link farm or SEO scam. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates this malicious pattern. No scripts were extracted from this sample.

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://engchurch.org/uploads/1/3/0/6/130639780/130639780.html#software+plagiarism+checker+free
    • http://mikebarrineau.com/uploads/1/3/0/6/130639061/950a1ee0bd9808d.pdf
    • http://rachealhomehealthcareinc.com/uploads/1/3/1/3/131398084/8e2e549fce.pdf
    • http://aaastructurualengineering.com/uploads/1/3/0/5/130588998/joxukivosexekanepemo.pdf
    • http://mullerandson.info/uploads/1/3/0/8/130874175/d2a05164.pdf
    • http://blacktiemusic.com/uploads/1/3/1/0/131071297/7315081.pdf
    • http://realhopeyouthcenter.net/uploads/1/3/0/7/130738591/jivituzanisap.pdf
    • http://vohitv.com/uploads/1/3/0/8/130813876/mawasakesijakixera.pdf
    • http://harringtonchiropractic.net/uploads/1/3/1/3/131398347/4981648.pdf
    • http://fundynutritionconsulting.com/uploads/1/3/1/3/131379236/7484681.pdf
    • http://capcitytravelball.com/uploads/1/3/0/5/130543168/fulejerivigofup_tebuguk_lijapofu.pdf
    • http://travelbytips.com/uploads/1/3/0/6/130605498/abff16c6.pdf
    • http://journeyofajellyfish.com/uploads/1/3/0/4/130483373/6a45d8c2eb3c.pdf
    • http://erikabethmiller.com/uploads/1/3/0/3/130379589/8272526.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007b2a.bin
9f214fc7b28a935bebda6f34d691d45816090201fb9c02ae0001273bb84cb611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B2A 9276 bytes
font_01_sfnt_off00009ca1.bin
249fc0d3b200ecca5aefe8eb77fd0f998797de795f15ce592f40c0e0adcf455b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CA1 4808 bytes

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