Malicious PDF — malware analysis report

Static analysis result for SHA-256 6507a5baccdd373d…

MALICIOUS

PDF

56.7 KB Created: 2020-06-03 02:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44e5ff2985dda2169a804fc939a614cd SHA-1: 9efcdf004262922b4f07b515eec893c83a1c67a4 SHA-256: 6507a5baccdd373d7d49ae8a418dfbd6b678dab17f1ebda6b5979a0f3cd1a257
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to direct users to a large collection of potentially malicious or deceptive websites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a likely intent to lead users away from the document to a compromised or malicious site.

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://milspo.org/uploads/1/3/0/3/130379096/130379096.html#mindfulness+based+stress+reduction+w
    • http://jesus365devo.com/uploads/1/3/0/6/130639678/pifamojejej_bejedifa_pepemifajibadem_lalebur.pdf
    • http://cprrnny.com/uploads/1/3/0/4/130435574/b29544b9bd7a.pdf
    • http://thismaycomeinhandy.com/uploads/1/3/0/6/130604632/7114347.pdf
    • http://muziekcursusonline.com/uploads/1/3/1/3/131384185/9d3f703e0ed942d.pdf
    • http://hedgeappleweb.com/uploads/1/3/1/4/131438747/cb23dd74.pdf
    • http://wholhlth.com/uploads/1/3/0/4/130483582/risupi.pdf
    • http://htxheli.com/uploads/1/3/0/7/130739814/lewuba-xogidudi-vepoperakat-kezovofowu.pdf
    • http://theinterdependentorganization.com/uploads/1/3/1/6/131607240/ludojapekoloxuxufi.pdf
    • http://milspo.org/uploads/1/3/0/3/130379096/terms.html
    • http://milspo.org/uploads/1/3/0/3/130379096/dmca.html
    • http://milspo.org/uploads/1/3/0/3/130379096/policy.html
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://mimugolulame.files.wordpress.com/2020/05/jugonok.pdf
    • https://semijex.files.wordpress.com/2020/06/74129394144.pdf
    • https://dutilexov.files.wordpress.com/2020/05/xilifarakibur.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae9f.bin
d7f0fa681e5c3e01174444a95418a1c68df504c91bfdb893c0f52b8045454df7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE9F 11960 bytes

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