Malicious PDF — malware analysis report

Static analysis result for SHA-256 91c6192e543cae0b…

MALICIOUS

PDF

38.4 KB Created: 2020-03-27 09:26:11 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 915ff8d8de0825b3f9a802544e5ab0bd SHA-1: 3592db6191a8eea55b554dafebc23befc9f64052 SHA-256: 91c6192e543cae0b2200f87e3741077009f978e6117b319d2ef9eeb6cc820465
62 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body itself is largely unreadable binary data, but it does contain a reference to 'Acuerdo sobre evaluacion 11/03/19' and a URL that appears in the document body and was also extracted as an external URI. The primary attack pattern involves directing users to a vast array of other PDF files hosted on numerous domains, suggesting a link farm or content distribution network for malicious purposes.

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://yourchairmansclub.us/uploads/1/3/0/7/130738819/130738819.html#acuerdo+sobre+evaluacion+11%2F03%2F19
    • http://frombroken2whole.com/uploads/1/3/0/8/130874475/6492635.pdf
    • http://pivkofilm.com/uploads/1/3/0/2/130289214/xineluzage-nivewiluzewejet-tizugaso-lazugakojid.pdf
    • http://kin-onlinepov.com/uploads/1/3/0/7/130775758/gorobaj_kadefe.pdf
    • http://polkmga.org/uploads/1/3/0/6/130621657/gogonifup-mawaluzuvulog-rivikovili-vetisoman.pdf
    • http://nogginblock.net/uploads/1/3/0/6/130640174/zuninopisofonazogese.pdf
    • http://sweetwaterhomedecor.com/uploads/1/3/0/6/130605036/d90eaff3153064.pdf
    • http://mickeysbudgies.com/uploads/1/3/0/6/130604378/fivigobukufi_buvemezodil.pdf
    • http://geneedge.net/uploads/1/3/0/8/130814861/79cdb6.pdf
    • http://chevysalesgirl.com/uploads/1/3/0/8/130874376/badifidafisalukowido.pdf
    • http://susanjonsson.com/uploads/1/3/0/6/130622051/bupidijibibidolizol.pdf
    • http://jadealliance.org/uploads/1/3/0/2/130289385/julom.pdf
    • http://rachelsaitzyk.com/uploads/1/3/0/7/130740571/1002562.pdf
    • http://ultimate-life.net/uploads/1/3/0/5/130588542/6596c1be.pdf
    • http://shakeuphr.com/uploads/1/3/0/2/130287261/tofudirubeki.pdf
    • http://673comoavenue.com/uploads/1/3/0/2/130287533/71fcb29b98d.pdf
    • http://iclaudiainc.net/uploads/1/3/0/7/130776818/394ab52.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_off00006a8a.bin
73c07863c60168d63d2d356acaddcdd399dce063819679cf7af72bf168dfb033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8A 8904 bytes

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