Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca4c2629d78eeeb…

MALICIOUS

PDF

50.6 KB Created: 2020-04-05 15:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f97f902998e5ae1554668233ada6767f SHA-1: b3289bb188b06d5b803e124bc160c523305534ae SHA-256: 2ca4c2629d78eeeb7eb727efda6cc00d3432183951f8e9742fd2ca0eabefc26f
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The document body contains a reference to 'Que es g uevo gster en facebook', which, combined with the numerous links, indicates a likely attempt to drive traffic to potentially malicious or deceptive websites. No scripts were extracted, limiting the analysis of direct payload execution.

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://jazzscool.com/uploads/1/3/1/0/131070220/131070220.html#que+es+g%C3%A1ngster+en+facebook
    • http://mlfickcourtlandkindergarten.com/uploads/1/3/0/6/130604028/wukajeki-zudatin.pdf
    • http://100boysofcode.org/uploads/1/3/0/3/130313108/kadafidasoxo.pdf
    • http://sharmanic.com/uploads/1/3/0/6/130621965/lapizedibuto.pdf
    • http://coolhaushotel.com/uploads/1/3/0/7/130776449/kaxam.pdf
    • http://veerossicreates.com/uploads/1/3/0/9/130969607/375c9246d9726.pdf
    • http://igoeadvisors.com/uploads/1/3/0/3/130313468/7355941.pdf
    • http://mail.erlaube-dir-veraenderung.de/uploads/1/3/1/3/131381553/kebatopebazubowa.pdf
    • http://positivespotmarketing.com/uploads/1/3/0/7/130776575/4688941.pdf
    • http://spoilmefloral.com/uploads/1/3/0/7/130776315/6692610.pdf
    • http://hawaiianislandevents.com/uploads/1/3/0/7/130775474/7426907.pdf
    • http://taymorcap.com/uploads/1/3/0/6/130639784/c4a67029fb1fc.pdf
    • http://shopglamclaws.com/uploads/1/3/0/3/130313004/7c86fe30232.pdf
    • http://masterlibrary-staging.com/uploads/1/3/0/2/130270864/lelitiwos-tomefuf-bapajo-gijufof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a70.bin
41e5fdcdf6e9471146bd64571fd0777d25c10f1f49abcc08c03ead2708523420
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A70 9468 bytes
font_01_sfnt_off00009c96.bin
e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C96 2652 bytes
font_02_sfnt_off0000a5fd.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63
pdf-font-stream PDF embedded font (sfnt) at offset 0xA5FD 16036 bytes