Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d63dfc1c42b9e5…

MALICIOUS

PDF

34.7 KB Created: 2020-03-30 11:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a42a97d2e121a0b39fa5c886c2e036ef SHA-1: 475d8237004a65aafaf9d1e0a8a40a07097d7743 SHA-256: 20d63dfc1c42b9e51f71cfcf22af51f8ae6364baf0a9b4d64c920142a448e7c3
92 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDF files on different domains. This suggests a link farm or SEO poisoning tactic designed to drive traffic to potentially malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a large number of external links, indicating a non-standard document purpose.

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://greenwolfverticalfarm.com/uploads/1/3/1/1/131163666/131163666.html#valor+camioneta+kia+frontier+2010
    • http://bottegalongari.com/uploads/1/3/0/6/130639729/nutami.pdf
    • http://itsessentialforhealthandhappiness.com/uploads/1/3/0/8/130814197/xixasilatari.pdf
    • http://acpstudios.com/uploads/1/3/0/8/130873961/jaforalatunine_pefikusetune.pdf
    • http://chappyssportsmemorabilia.com/uploads/1/3/0/4/130483426/1732828.pdf
    • http://stevensonsconglomerategroup.com/uploads/1/3/0/3/130323214/dasovomugan-nupub.pdf
    • http://memoriescapturedphotography.net/uploads/1/3/0/7/130738825/larunesonumadujag.pdf
    • http://acepaintingnanaimo.com/uploads/1/3/0/6/130639862/f50e741021.pdf
    • http://mysignsplus.com/uploads/1/3/0/7/130776561/4676451.pdf
    • http://haoexpression.org/uploads/1/3/0/9/130969243/4250153.pdf
    • http://quietwhispersministry.com/uploads/1/3/1/3/131380539/mopoverubur_jelifojovavi_dugos.pdf
    • http://serenityhumanservices.org/uploads/1/3/0/9/130969313/f4a025cc298.pdf
    • http://shotonstage.org/uploads/1/3/0/9/130969077/zoburexi.pdf
    • http://hathaholistic.com/uploads/1/3/0/9/130969059/7fae4.pdf
    • http://nncconjesucristo.com/uploads/1/3/1/4/131409309/wubojuz-venasazazajo.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_off00005c38.bin
586ba338b39f351df4e606529a370eb1ee02ef27ebd2384d9bf13b6c1c739225		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C38 8672 bytes

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