Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f3ffd68dab321a…

MALICIOUS

PDF

54.2 KB Created: 2020-04-09 15:50:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4019e2ba431eccac80af1e729ce822bc SHA-1: 5972e796898e796b92308fc2de41b5b5c17d71d5 SHA-256: b2f3ffd68dab321a19c7e84854cf2c6de44efc5013b4a4855373859bd411c9aa
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files on different domains. This behavior is indicative of a link farm or SEO spam campaign, likely intended to drive traffic or distribute malicious content. The document body contains garbled text and metadata from the wkhtmltopdf tool, suggesting it was programmatically generated rather than user-authored content. 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://ciggysound.com/uploads/1/3/0/7/130740364/130740364.html#las+habilidades+motrices+b%C3%A1sicas+son
    • http://hoteldanubio.org/uploads/1/3/0/6/130621093/6714638.pdf
    • http://rivelazioniprivate.org/uploads/1/3/0/3/130313115/1b9d0e98122d0.pdf
    • http://retirementfocused.com/uploads/1/3/0/6/130605442/2369756.pdf
    • http://nutravelsolution.com/uploads/1/3/0/4/130436094/wuxipozujivo.pdf
    • http://beastofblendz.com/uploads/1/3/0/3/130313272/sapajasasoxisexuzu.pdf
    • http://centralelectricgroup.com/uploads/1/3/0/9/130969259/luxalurobites_tegifigod_fefebepuzagax.pdf
    • http://deitzlandsurveying.com/uploads/1/3/0/7/130739147/db27727fbcf4.pdf
    • http://carbonfiberbows.com/uploads/1/3/0/2/130291416/mufilegami_kawivigaromute_kavid_zakevinu.pdf
    • http://wildpct.com/uploads/1/3/0/2/130272573/vuvesaruwox-tewosijotol.pdf
    • http://sfiles.net/uploads/1/3/0/4/130478067/48f0745fa008c2.pdf
    • http://theguamwomensclub.com/uploads/1/3/0/7/130738513/mawagatesa.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_off0000a9f4.bin
f388afe06967a90ee4fd4ebc9b53c8158cf3164cdc65995c11b6bebdf4550a0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9F4 8720 bytes

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