Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d19833021454fd…

MALICIOUS

PDF

40.8 KB Created: 2020-03-27 12:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: fdcd44885ce2bc2fd2e777274f0774d4 SHA-1: dd25e5fdb024eafed2b3336f9ea1657335959d8f SHA-256: 93d19833021454fd960c87ce0bb884ab79be9f0de0d58543ecb05d09830dec10
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also strongly indicated maliciousness. The document body contains what appears to be obfuscated text and URLs, suggesting an attempt to disguise the malicious nature of the links. The primary goal appears to be directing users to a network of websites, likely for SEO spam or to host further malicious content.

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://krattliministries.org/uploads/1/3/0/7/130739082/130739082.html#best+cartridge+for+pioneer+pl-518
    • http://rpprincess.com/uploads/1/3/0/6/130604386/7352551.pdf
    • http://nicklibonati.com/uploads/1/3/0/6/130639978/1356710.pdf
    • http://www.eliteto.com/uploads/1/3/0/8/130874201/jarexog-wedulazibojoju-vukuw.pdf
    • http://tannerromleski.com/uploads/1/3/0/6/130605438/145aaf276.pdf
    • http://spring.anudebating.com/uploads/1/3/0/7/130740612/bixovirefuguzebop.pdf
    • http://computerrepairsanantoniotx.com/uploads/1/3/0/6/130620584/gipafuziz_fetupaxu.pdf
    • http://placesyoullgop.com/uploads/1/3/0/3/130323581/bfb29dda0cc.pdf
    • http://halostudioonmarket.com/uploads/1/3/0/5/130539099/3932549.pdf
    • http://bearsvsbabiesgame.net/uploads/1/3/0/6/130620745/42c8f7d.pdf
    • http://mingoadventures.com/uploads/1/3/0/6/130620673/8628750.pdf
    • http://larasimpson.com/uploads/1/3/0/6/130639107/suxuvit.pdf
    • http://faswer.space/uploads/1/3/0/5/130588603/372682.pdf
    • http://jlucemodernhomes.com/uploads/1/3/0/2/130291803/wifutegu_pajulofiziru_vetuja_valameku.pdf
    • http://braizbistro.com/uploads/1/3/0/7/130738924/vujetunepapima.pdf
    • http://7soundenergy.com/uploads/1/3/0/6/130640183/395424.pdf
    • http://vancouvermobilewelding.com/uploads/1/3/0/6/130604321/jofuserap_rajid.pdf
    • http://enjoni-cafe.com/uploads/1/3/0/8/130874389/2190861.pdf
    • http://kameronanessa.com/uploads/1/3/0/5/130539987/7321341.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_off0000765c.bin
608c3e48653d8de53790996f7e38345a86694923a8a09f5cb3cf5f6cd26683da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x765C 8044 bytes

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