Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf02f07d3f983e5…

MALICIOUS

PDF

60.8 KB Created: 2020-03-22 03:45:57 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d9a9a501aff8da65b192c8247d9c5d93 SHA-1: 74ec6e4449663d82c845011b3de5090d15122000 SHA-256: 5cf02f07d3f983e5cef50d1b9277c91a4d5a694913e03ce157c817d598868eb6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified as a PDF SEO link farm. The primary link points to 'mychinesewatch.com', suggesting a potential lure or redirection to malicious content. While no scripts were explicitly extracted, the PDF structure and extensive link farm indicate an attempt to manipulate search results or direct users to harmful websites, likely as part of a phishing or SEO spam campaign.

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://mychinesewatch.com/uploads/1/3/1/0/131070378/131070378.html#3+caracteristicas+o+propiedades+del+estado+plasma
    • http://writersplot.com/uploads/1/3/0/6/130620912/bunesad-revagar-lewawut-niravuwibenakul.pdf
    • http://australiancrusadersparty.com/uploads/1/3/0/5/130545194/9749586.pdf
    • http://bestbranchcompany.com/uploads/1/3/0/8/130874029/bemidutix_zumukekeguf_wizajekubude_zetovazike.pdf
    • http://affordable-inflatables.com/uploads/1/3/0/6/130604415/5fe4d48bc3f8f2.pdf
    • http://chrisburnettvoiceactor.org/uploads/1/3/0/4/130435726/4241439dec3.pdf
    • http://fhbosch.com/uploads/1/3/0/5/130588567/a87fe8b4c.pdf
    • http://michellestartzman.com/uploads/1/3/0/6/130605174/bimurogadimidotonal.pdf
    • http://www.martinestowers.com/uploads/1/3/0/6/130621597/pevum_kugemijopamo.pdf
    • http://www.wildfireawakening.com/uploads/1/3/0/4/130476013/6821207.pdf
    • http://mactrainingsolutions.com/uploads/1/3/0/8/130874326/882e361f1a724ea.pdf
    • http://autoimmunefoodguide.com/uploads/1/3/0/6/130621057/236ae0f89.pdf
    • http://ecityjava.com/uploads/1/3/0/6/130639212/webinu.pdf
    • http://stemleyclassicallearning.com/uploads/1/3/0/8/130874592/jurexafokaj.pdf
    • http://myorhythm.org/uploads/1/3/0/2/130272275/1e4500d0c673.pdf
    • http://speedytowingspares.co.za/uploads/1/3/0/5/130588937/donifibujogiwili.pdf
    • http://mail.mobilihracat.com/uploads/1/3/0/6/130604720/fitud-pinofu.pdf
    • http://boneyardbeanies.com/uploads/1/3/0/6/130603900/wusaverosupabos-lanoxujot.pdf
    • http://hollyheather.com/uploads/1/3/0/8/130813957/gudila-bedunubalalasok-nivibix-gokeba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b423.bin
5fd70907e60e11abc5d13ab093dec5806a45bbc1a7258c189518c8dd669cb1fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB423 10504 bytes
font_01_sfnt_off0000d874.bin
ba10aeca92ddbe5c348842135f45a42f06903c7dc6af11c9d9577200896e48df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD874 2940 bytes

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