Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ec8cdb4a5e3252…

MALICIOUS

PDF

58.3 KB Created: 2020-03-27 08:19:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 79914d9c7032b0eb5174011b32351607 SHA-1: efccc90814d525489c537e9932a84763bd398454 SHA-256: a7ec8cdb4a5e32522528d5aff02ef75e9e3bef85e5159ee79b725288d8bffac2
62 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or content distribution network. The document body, though partially corrupted, contains the title 'Modelo social del crecimiento humano' and references wkhtmltopdf, indicating it was likely generated programmatically. The primary attack pattern involves directing users to a multitude of external PDF resources.

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://dunkhilldrygoods.com/uploads/1/3/0/7/130739978/130739978.html#modelo+social+del+crecimiento+humano
    • http://policentrico.org/uploads/1/3/0/7/130739141/6781568.pdf
    • http://www.moonsana.com/uploads/1/3/0/6/130605504/guxaz.pdf
    • http://bedouinchick.com/uploads/1/3/0/6/130639136/4718560.pdf
    • http://johnburrows.sitehappy.com/uploads/1/3/0/2/130271030/20661f11bf.pdf
    • http://www.playfullyrefined.com/uploads/1/3/0/3/130379289/bc6657c23f.pdf
    • http://ambersorganical.com/uploads/1/3/0/5/130539059/nofututeja.pdf
    • http://solagratiakennels.com/uploads/1/3/0/3/130312965/513077.pdf
    • http://capricorn6thand10th.com/uploads/1/3/0/6/130620530/5977169.pdf
    • http://www.photosbydaniel.org/uploads/1/3/0/6/130604710/9f4ec363808.pdf
    • http://emyhill.com/uploads/1/3/0/7/130776247/pokan.pdf
    • http://mjmallc.com/uploads/1/3/0/6/130621382/romokeponefo.pdf
    • http://www.coachingcreating.com/uploads/1/3/0/6/130603682/219050.pdf
    • http://satiko.cz/uploads/1/3/0/6/130604144/disadi.pdf
    • http://myfinancialadvise.com/uploads/1/3/0/4/130483178/7494238.pdf
    • http://www.myearlylearningbox.com/uploads/1/3/0/6/130621507/504399.pdf
    • http://simonnago.com/uploads/1/3/0/2/130271187/1d44b.pdf
    • http://adarcoeus.dk/uploads/1/3/0/4/130483761/jejavenozanuxesike.pdf
    • http://elliotshaw.com/uploads/1/3/0/7/130739416/1520919.pdf
    • http://dtp-pres-training.co.uk/uploads/1/3/0/5/130539440/tozemitimabujuparuwu.pdf
    • http://deanmeminger.com/uploads/1/3/0/8/130874088/lozesemuzupuj-mejofedamukat-lelikozawesiwud-nomef.pdf
    • http://cityonloc.com/uploads/1/3/0/2/130288514/69b62b.pdf
    • http://occupassion.co/uploads/1/3/0/5/130589104/sabupudukuborodo.pdf
    • http://milestoneco.net/uploads/1/3/0/6/130621406/zivopi-jalin.pdf
    • http://oldrectorystud.com/uploads/1/3/1/0/131070604/gimukoxove-xedig-vopekupeboto-xowedupibojutaw.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_off0000b8c0.bin
dd30945bda8032f81b879787e033901e7e36a71c48f6c63adab6908f606390fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8C0 8956 bytes

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