Malicious PDF — malware analysis report

Static analysis result for SHA-256 557d9dfc8b1c12c3…

MALICIOUS

PDF

35.8 KB Created: 2020-04-28 14:55:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 78c62d6c1b54be8b4d956128a5bc1f10 SHA-1: 2cbca60fe991caa90aac8443a7a54dd65c149ccb SHA-256: 557d9dfc8b1c12c38faa6c387ca72dff155826d185ed5ae712cc9980510af2a0
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 point to similarly structured URLs on different domains. This suggests a link farm or SEO manipulation tactic. The document body contains text that appears to be metadata or corrupted content, but the presence of the URL 'http://mengtaosun.com/uploads/1/3/1/3/131381693/131381693.html#yorick+top+guide+s9' within the document body further supports the link farm hypothesis. 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://mengtaosun.com/uploads/1/3/1/3/131381693/131381693.html#yorick+top+guide+s9
    • http://tenkai.online/uploads/1/3/1/1/131164236/8562182.pdf
    • http://evelynhsullivanmediation.com/uploads/1/3/0/9/130969561/4904551.pdf
    • http://gracewhisenand.com/uploads/1/3/0/5/130588588/8139645.pdf
    • http://twisumi.com/uploads/1/3/0/7/130738596/ee0a9.pdf
    • http://bestbusinesshere.com/uploads/1/3/0/2/130291536/af59dfb42f369.pdf
    • http://desertvalleygaragedoor.com/uploads/1/3/0/8/130874570/zidanowoje.pdf
    • http://beautifiebutterflys.org/uploads/1/3/0/4/130489742/fff468066d.pdf
    • http://melbournefoundationrepair.com/uploads/1/3/0/8/130814594/bunekelilezaxun.pdf
    • http://sararyanduffy.com/uploads/1/3/0/9/130969260/bizim.pdf
    • http://balloonfashionshow.eu/uploads/1/3/0/6/130605443/laturavaru_dunomex.pdf
    • http://chiarisyrinx.com/uploads/1/3/0/5/130588258/1732e71045.pdf
    • http://thefishvan.com/uploads/1/3/0/7/130739583/899a050cb7cc.pdf
    • http://brillosearch.se/uploads/1/3/0/3/130313605/pejabimabifofapis.pdf
    • http://gracewhisenand.com/uploads
    • 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_off000065ec.bin
5fda3673e14003402a4a540d10fa3919f3f8604d41da1dcdd74e9ffa4f41f30f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65EC 7516 bytes

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