Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a66fbe4bf774d9…

MALICIOUS

PDF

60.2 KB Created: 2020-03-29 08:03:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a3094c81cad128b3610f7f28ae30223d SHA-1: 7b75ad653039231cfccf885dab337cfdbd3dc60f SHA-256: c1a66fbe4bf774d97d0497ac146d46e44ea58f77fe6df104b0a55d6dc5bec0e2
92 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. These links point to various domains, suggesting a link farm or a method to distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the presence of numerous external URLs indicates a likely attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://74-123-77-90.mgwnet.com/uploads/1/3/1/4/131438556/131438556.html#las+profesiones+en+espanol+pdf
    • http://nses.northsmithfieldschools.com/uploads/1/3/0/5/130590698/velonosute.pdf
    • http://simplescribe.net/uploads/1/3/0/7/130775654/kuxitisazibuxu.pdf
    • http://abovetumblerridge.ca/uploads/1/3/0/6/130604024/7536251281cddc.pdf
    • http://palmettochapterofahna.org/uploads/1/3/0/2/130274301/6706191.pdf
    • http://frontierpartnersllc.org/uploads/1/3/0/5/130551517/8298859.pdf
    • http://tudoparafoto.com/uploads/1/3/0/3/130323767/vibixune-datomipabijad-wexifozatunegev.pdf
    • http://www.autorickshaw.com.au/uploads/1/3/0/4/130490476/somunarinapewanaj.pdf
    • http://openskydigitalmarketing.com/uploads/1/3/0/7/130739633/mitipalife.pdf
    • http://cpanel.topdogobediencetraining.com/uploads/1/3/0/4/130476505/wibojewawade.pdf
    • http://globaly.net/uploads/1/3/0/5/130540146/088d14c0d.pdf
    • http://mindbodysoulllc.com/uploads/1/3/0/4/130476024/1564926.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009264.bin
a4dbfa2e373c6393ad492ac1dd36d202c7ec1a401b3cfedc22fb0715e4f3a57d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9264 9628 bytes
font_01_sfnt_off0000b493.bin
11eff0542ee112a7a4f3d5fa86892f13f7f7c80edb17354215cea33bb7714487		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB493 2768 bytes
font_02_sfnt_off0000be59.bin
83459e82cebe561b9e65dda6a09953c9e35f75e5df0fa62a624e1833cc5b8086		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE59 1708 bytes
font_03_sfnt_off0000c6c0.bin
480845afcd115f9107ba4133765aa210d084eb1b3e159c2f9304e1033bdefa67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C0 17408 bytes

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