Malicious PDF — malware analysis report

Static analysis result for SHA-256 002b99401d2cfdcb…

MALICIOUS

PDF

37.8 KB Created: 2020-03-22 04:55:12 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a0eac85512239fbf6d0db7088593111c SHA-1: 9bf1347010f2db0c1f0dc8bb2ee36bebd5f4c93b SHA-256: 002b99401d2cfdcb074e83ab4c07d8ed7ac01e60c01ad160c8a2be96c4d76f89
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The ML classifier strongly flagged this PDF as malicious. The document body, though partially corrupted, contains references to URLs that are likely part of this link farm, suggesting a scheme to drive traffic to potentially malicious sites or manipulate search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://speelkoning.net/uploads/1/3/0/6/130621801/130621801.html#que+es+ulcera+duodenal+forrest+iii
    • http://duilawvt.net/uploads/1/3/0/7/130776249/323030fdb9.pdf
    • http://internationaldebutanteball.net/uploads/1/3/0/4/130476102/puvufifewojofilu.pdf
    • http://www.artitudemarty.com/uploads/1/3/0/7/130738754/purixikejibut.pdf
    • http://mail.helpbreakmyhabit.com/uploads/1/3/0/2/130272361/sovewewojane-sowew-gerunexol-tijitaxugevuje.pdf
    • http://speedequityrealtyllc.com/uploads/1/3/0/4/130435531/suludiw.pdf
    • http://livinggracedenver.org/uploads/1/3/0/6/130621422/8748495.pdf
    • http://995silver.com/uploads/1/3/0/2/130292148/5cb335f5.pdf
    • http://www.msrosspblclassroom.org/uploads/1/3/0/5/130589384/4481251.pdf
    • http://huntingdonifc.com/uploads/1/3/0/6/130604416/2243283.pdf
    • http://plaquehd.com.au/uploads/1/3/0/2/130291694/zajadibuxeluxuxa.pdf
    • http://moonlilee.com/uploads/1/3/0/7/130776661/fadixiserala.pdf
    • http://www.paleofeest.com/uploads/1/3/0/2/130273993/a5bbf932ef8c52.pdf
    • http://ahgeneralbuilding.net/uploads/1/3/1/1/131164437/2011288.pdf
    • http://www.flatpackassembly.biz/uploads/1/3/0/7/130775653/1061882.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_off00006ab9.bin
478ba1521ea9af2ef1ad759f470d1394381e1ed00068c3713727c873dc5f53d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB9 8048 bytes

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