Malicious PDF — malware analysis report

Static analysis result for SHA-256 f71d7919a8eb8108…

MALICIOUS

PDF

40.2 KB Created: 2020-04-13 08:39:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 708bf3aab2d3de7c73aec64d73fac09c SHA-1: 2175fecbc8defd06ad5f07c6f1a1ddd872f8d90f SHA-256: f71d7919a8eb8108cc86049b327c64b4fd3b7425e5f789eebb3e79d75dccbc2d
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files hosted on similar domains. The document body text, though partially corrupted, suggests a lure related to reading comprehension. This pattern is indicative of a link farm or SEO poisoning technique used to distribute malicious content or phish for information. 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://natandcar.com/uploads/1/3/0/7/130775822/130775822.html#cuadernillo+de+comprension+lectora+pdf
    • http://markdmullenart.com/uploads/1/3/1/4/131411199/2866209.pdf
    • http://nanascomfortfoodskansas.com/uploads/1/3/0/5/130539270/madesile.pdf
    • http://realhemprelief.com/uploads/1/3/0/7/130738781/5489938.pdf
    • http://outside-inspiration.com/uploads/1/3/0/6/130620852/5293567.pdf
    • http://sysbss.com/uploads/1/3/0/7/130776678/xowawapi-xosamupufizakuf-lidigogen.pdf
    • http://nyacs-co.com/uploads/1/3/0/6/130639580/2541307.pdf
    • http://robinthereikiproducts.com/uploads/1/3/0/5/130543996/f1c00dd3f705.pdf
    • http://expatchronicals.com/uploads/1/3/0/6/130604589/3e70b2b380.pdf
    • http://mixforteachers.com/uploads/1/3/1/0/131070216/wuvugu.pdf
    • http://biologicsandvaccines.com/uploads/1/3/0/5/130551486/buvofijabosamulolami.pdf
    • http://blacktiebartendersllc.com/uploads/1/3/0/2/130287919/5f75fff9a1e32.pdf
    • http://jattlife.us/uploads/1/3/0/7/130740242/7b4fec510a4f.pdf
    • http://successsoldier.com/uploads/1/3/0/7/130739324/getor_wupidatijavubid_tapire.pdf
    • http://hdpetrochemicalsolution.com/uploads/1/3/0/6/130621782/mekewugoni.pdf
    • http://ianwhiteguitars.com/uploads/1/3/1/4/131437435/vamuxusopevaj_bitorozuxoman.pdf
    • http://successsoldier.com/uploads/1/3/0/7/130739324
    • 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_off0000708a.bin
6a8c89b18f1d40d0df73c03528d0ea96a7e004a31daebf2b37945a471039ce70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x708A 9708 bytes

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