Malicious PDF — malware analysis report

Static analysis result for SHA-256 569ac473ebc93f47…

MALICIOUS

PDF

32.7 KB Created: 2020-04-13 16:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2b1b49ef237e048fcfaf2cddee07753d SHA-1: eb05bfa875feef1602a5edf44a15d1b40966e3e6 SHA-256: 569ac473ebc93f478054aa83a01a74af4f08f0c563ec8db5214f648522008106
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or SEO abuse. The ML classifier strongly flagged this PDF as malicious. The embedded URLs suggest a campaign to drive traffic to these linked documents, potentially for distributing malware or phishing content.

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://breeznetworks.com/uploads/1/3/0/5/130543364/130543364.html#aroma+rice+cooker+instructions+for+brown+rice
    • http://diamondpeakcampers.com/uploads/1/3/1/1/131164446/wubavujo.pdf
    • http://letsbecreative.shop/uploads/1/3/0/4/130488734/foniruk-kusoj-fegufibe.pdf
    • http://bdxpress.net/uploads/1/3/0/7/130776611/liguvejosenutixaven.pdf
    • http://nwawealth.com/uploads/1/3/0/2/130274151/3639324.pdf
    • http://odeliatucker.com/uploads/1/3/1/3/131383580/dilumovilode.pdf
    • http://funlolacokershop.com/uploads/1/3/0/5/130588410/ridonul_zikul_kivaw_wifidadi.pdf
    • http://shimmernshinecleaners.com/uploads/1/3/0/5/130543772/robewojisokevibe.pdf
    • http://goodvibesholisticwellness.com/uploads/1/3/0/7/130739404/6295350.pdf
    • http://saveaseoul.com/uploads/1/3/0/7/130739107/guzerak.pdf
    • http://printmunkey.com/uploads/1/3/1/4/131453871/kepojobadaxizaras.pdf
    • http://sadiesugarman.com/uploads/1/3/1/4/131453894/1272704.pdf
    • http://jlkarchitects.com/uploads/1/3/0/6/130621084/labobon.pdf
    • http://disk2.net/uploads/1/3/1/3/131383480/641e793789.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_off00005947.bin
d3b3d3eb4b4dd748f43598912de2d3d0956d514f84e33dfb5d9aabf0e4ad626e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5947 7488 bytes

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