Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a976b9cd0805362…

MALICIOUS

PDF

31.6 KB Created: 2020-03-10 04:08:49 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 78b87bd83ba11475eea307874e059c2c SHA-1: 20629d62061aad1ed7d77c06a9a28bb3e5797d3a SHA-256: 4a976b9cd0805362a324214597144106a50f08a9ed1f3ef54050e0bba0b0d953
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, a technique often used for SEO spam or to redirect users to malicious sites. The document body contains text related to 'Nitric acid fuming 100 msds' and mentions the authoring application 'wkhtmltopdf', suggesting a lure to technical documentation. The embedded links point to various domains, many of which appear to host similar PDF files, indicating a link farm or content duplication strategy. No scripts were extracted from this sample.

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://teamgls.com/uploads/1/3/0/6/130639221/130639221.html#nitric+acid+fuming+100+msds
    • http://ivxworld.com/uploads/1/3/0/7/130776040/murawa_bewow.pdf
    • http://hostmaster.chartwellprimarymaths.org.uk/uploads/1/3/0/5/130539393/taxarejuxe_galitelunov.pdf
    • http://prettyinwhite.net/uploads/1/3/0/7/130776088/893a2.pdf
    • http://hotelvic-phase2-zh.devsite-1.com/uploads/1/3/0/4/130489933/9287561.pdf
    • http://admin.jayfeli.com/uploads/1/3/0/5/130543798/2f797b3408c.pdf
    • http://blvd420.com/uploads/1/3/0/3/130323120/7439655.pdf
    • http://overpochsmostwanted.com/uploads/1/3/0/7/130739828/9484074.pdf
    • http://www.thievesden.com/uploads/1/3/0/8/130814716/7781390.pdf
    • http://maxontowerhairsalon.com/uploads/1/3/0/5/130588799/zowovoj.pdf
    • http://www.blkgrlboss.org/uploads/1/3/0/2/130291589/zibezefexab.pdf
    • http://www.woodiesbodyshop.com/uploads/1/3/0/3/130379377/nogej-dafefewid-romixawu-vikujilux.pdf
    • http://themessageofnabiisa.org/uploads/1/3/0/5/130588893/sozuwexu_pudeweronew_sizasuzam_sosogezu.pdf
    • http://www.mailonlineuk.com/uploads/1/3/0/6/130604326/5125045.pdf
    • http://www.abstracted.com.au/uploads/1/3/0/3/130379316/6475198.pdf
    • http://woodlandstuition.com/uploads/1/3/0/2/130287279/nogelotupituj.pdf
    • http://misshufnagel.com/uploads/1/3/0/5/130590219/biduwujujizera.pdf
    • http://cpanel.mtnsaa.org/uploads/1/3/0/5/130547689/dbc0212bbd73.pdf
    • http://wepaintct.com/uploads/1/3/0/2/130289789/xajeziterubisodisama.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_off00005658.bin
52a09e72826bb7885fdb86e5c584e823cf983bfc13852152fa6f4d199ed56ff1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5658 6692 bytes

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