Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e5406a20b8554e…

MALICIOUS

PDF

42.5 KB Created: 2020-05-17 05:16:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59a5c9847ebab2321dc42b2b550f156f SHA-1: 136de8ff536202e5a3050dd71ebf0219d6252866 SHA-256: 12e5406a20b8554e4e18c5c5b2c4ef46ce3b9776723d715275706da541c2128a
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, pointing to various domains. The document body, though partially corrupted, also contains some of these URLs. This suggests a campaign to manipulate search engine results or distribute content through a link farm, rather than a direct exploit. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://thearmory.io/uploads/1/3/0/6/130620758/130620758.html#restful+api+testing+with+postman
    • http://derekacandelore.com/uploads/1/3/1/0/131069898/420aad3.pdf
    • http://magesterconsultantservices.com/uploads/1/3/0/9/130970008/85fa58c.pdf
    • http://constructiondiaries.net/uploads/1/3/0/7/130775540/jewebopawivos.pdf
    • http://threading-beauty773.com/uploads/1/3/1/1/131163834/jokonili-binituresofune.pdf
    • http://mediationstrafrecht.nl/uploads/1/3/0/6/130605358/kovejema-zilejapeb.pdf
    • http://interkonsolutions.com/uploads/1/3/1/4/131437980/vodelomava.pdf
    • http://mothersandfosters.com/uploads/1/3/0/3/130323928/566d99a19c9fa.pdf
    • http://iesputinacum.net/uploads/1/3/0/8/130873869/87248.pdf
    • http://franklinjgreene.com/uploads/1/3/1/3/131378898/gogub_dasasomikined_baxakelinoz_venomaxuluwute.pdf
    • http://pakalolo-tees.com/uploads/1/3/0/6/130621086/famajuzijewomis-gabazofimugine.pdf
    • http://franchisemanagementsolutions.com/uploads/1/3/1/0/131071277/5702111.pdf
    • http://maryannweber.com/uploads/1/3/0/2/130291485/5494977.pdf
    • http://beginwelldoula.com/uploads/1/3/0/4/130435706/8772249.pdf
    • http://agenciaaman.org/uploads/1/3/0/5/130589123/zikapawiw.pdf
    • http://hautlab.com/uploads/1/3/1/4/131453588/puxosasuxupipodaji.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079a9.bin
df8133be793e643abe0d702a6106ca69eb72bcf08e41fbf1b89c0dac292776b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79A9 10852 bytes

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