Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d697fc0aedd140…

MALICIOUS

PDF

45.6 KB Created: 2020-03-08 11:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7596536d33717659e079b89458f2599f SHA-1: 18ea73d9b4141a2db504e835f24ebe194a091a37 SHA-256: 68d697fc0aedd1406b55c01d1629685f61b602890876e072e5cf04014b38ffb8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a PDF link farm. The primary URL points to a page with medical-sounding text, likely a lure. The ML classifier strongly indicated maliciousness, and the PDF structure itself is suspicious due to the mass of outbound links.

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://74-123-75-237.mgwnet.com/uploads/1/3/0/8/130874238/130874238.html#carcinoma+epidermoide+no+queratinizante+de+cervix
    • http://zumecareers.com/uploads/1/3/0/4/130488539/2e28ab6aa.pdf
    • http://nowmetoo.com/uploads/1/3/0/5/130543945/9932284.pdf
    • http://kemptonrentals.com/uploads/1/3/0/6/130620478/ce51fad5dc9ee14.pdf
    • http://claybon.shop/uploads/1/3/0/7/130776801/seguxazegesumupajij.pdf
    • http://www.kulturenaturalhair.com/uploads/1/3/0/4/130476605/8ff64cd3808.pdf
    • http://oursustainableag.com/uploads/1/3/0/7/130776255/3ab21ee74e994.pdf
    • http://australianbabyproducts.net/uploads/1/3/0/9/130969462/9546769.pdf
    • http://solectwokamienica.pl/uploads/1/3/0/5/130539297/67603e59.pdf
    • http://mail.flavoredflowstudio.com/uploads/1/3/0/5/130588821/fotetunos_favaxa_sonot.pdf
    • http://www.gabrielahernandezmusic.com/uploads/1/3/0/6/130621300/af44e9961e56.pdf
    • http://aadvantagehomeinspection.com/uploads/1/3/0/4/130476204/lijopofala.pdf
    • http://www.bakerymadbatter.com/uploads/1/3/0/5/130551957/5162022.pdf
    • http://peppercornstone.com/uploads/1/3/0/7/130738511/9642342.pdf
    • http://winewiseidaho.com/uploads/1/3/0/5/130543064/053242b13f.pdf
    • http://brittbolduc.com/uploads/1/3/0/6/130620715/gogukivuvubasulavexi.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_off00008746.bin
556d1f34f0262560b1f7386d2bb2cc34d1780e730052c3aa4d01c40379f6dab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8746 8808 bytes

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