Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea2ce2d976292aa…

MALICIOUS

PDF

49.0 KB Created: 2020-04-03 13:03:21 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b528855c9078d109135356d967a84109 SHA-1: b4f52f27d852e3973e207aba29b17996d6bbf8f6 SHA-256: 6ea2ce2d976292aa326ba0f5a7c95ab2f2bae9175c9aa7bc9cf1f52a3530a346
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic identified a mass of external PDF links, suggesting a link farm or redirection scheme. No scripts were extracted, but the sheer volume of outbound links points to a malicious intent to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://marmarworld.com/uploads/1/3/0/4/130488270/130488270.html#salario+minimo+mensual+ciudad+de+mexico+2020
    • http://rixibaby.com/uploads/1/3/0/3/130379314/jigaxumog-zavakikarowuzu-jizatuxilipexu.pdf
    • http://guelldisabilitysolutions.com/uploads/1/3/0/4/130476880/pofawogofonaneka.pdf
    • http://vaquerocanyonadvisors.com/uploads/1/3/0/2/130287923/d7de8c8e6d968.pdf
    • http://bookkeepingcareuk.com/uploads/1/3/0/7/130739117/9c6bc0ebb100c1c.pdf
    • http://tonidinuzzo.com/uploads/1/3/0/6/130621115/zuvedupix.pdf
    • http://yourlightingpackage.com/uploads/1/3/0/9/130969360/cabdc18e3b020.pdf
    • http://changeleadersevents.com/uploads/1/3/0/6/130620282/1563153.pdf
    • http://goddessmedianyc.com/uploads/1/3/0/7/130776878/28361f4d6782.pdf
    • http://simsafely.com/uploads/1/3/0/6/130604179/lukixaxopow_lixak_zedibukukudijax_duromesowel.pdf
    • http://trueyouth4u.com/uploads/1/3/0/4/130491079/gazasabakexaboso.pdf
    • http://thebarnesbrittlefactory.com/uploads/1/3/0/7/130738993/3522841.pdf
    • http://tourephotos.com/uploads/1/3/1/4/131437312/4567264.pdf
    • http://pagebirmingham.com/uploads/1/3/0/4/130483109/6765692.pdf
    • http://centralplainsmc.net/uploads/1/3/0/5/130551704/5492071.pdf
    • http://lsacleaningservices.com/uploads/1/3/0/3/130323929/43a2a321d56.pdf
    • http://aaagospelminister.com/uploads/1/3/0/5/130539107/403950.pdf
    • http://johnlcox.com/uploads/1/3/0/7/130739313/vokiguseroju.pdf
    • http://ghunterhanks.org/uploads/1/3/0/5/130542734/ruluwitexajavolu.pdf
    • http://chipzcookie.com/uploads/1/3/0/5/130551684/dofobevu-fazes-jawoxix.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_off000091fc.bin
257f4f68b1d091a62313fe9b8058ced5aeeed7ebe106cba4deb035de5e45900b
pdf-font-stream PDF embedded font (sfnt) at offset 0x91FC 9648 bytes