Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fcbb299bd1f902d…

MALICIOUS

PDF

39.5 KB Created: 2020-03-27 12:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de811e170bd382c1cdfca05f8d502d6c SHA-1: 8c8c753c803fba9c61502d8c6a9e0abd0be8c291 SHA-256: 5fcbb299bd1f902ded38c91461ddee8faab5d6c92cd65bf1352ea089648935dc
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, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The embedded URLs likely lead to further malicious content or phishing pages.

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://lunatictechnology.com/uploads/1/3/0/6/130603997/130603997.html#concordancia+de+sustantivo+y+adjetivo+ejemplos
    • http://reginaatelier.pl/uploads/1/3/0/8/130813834/pefolitasejo.pdf
    • http://elenafilip.com/uploads/1/3/0/5/130589411/ruxovawali-pasisuvid-gososejekedo.pdf
    • http://lemaitrebbq.nl/uploads/1/3/0/6/130639841/9226aed20a9.pdf
    • http://doroeng.com/uploads/1/3/1/1/131163777/lizera-difizexexased-vexinikatux-dusar.pdf
    • http://loftoninnovation.net/uploads/1/3/0/6/130604931/domari.pdf
    • http://oakdalepoolservice.com/uploads/1/3/0/8/130874175/lezib.pdf
    • http://www.iletranslates.com/uploads/1/3/0/4/130488626/madanuzipasexisura.pdf
    • http://lustrepeach.com/uploads/1/3/0/6/130604428/629266.pdf
    • http://pcbaugh.com/uploads/1/3/0/6/130621413/jajokuzugiwan.pdf
    • http://ccamsolutions.com/uploads/1/3/0/4/130483253/4711543.pdf
    • http://www.planagmatandgreacademy.com/uploads/1/3/0/7/130775528/7917a.pdf
    • http://mx.sandrefotoagency.com/uploads/1/3/0/6/130620853/1355736.pdf
    • http://www.ontargetmolecules.com/uploads/1/3/0/6/130621912/970baa96dad.pdf
    • http://www.momentswithmika.com/uploads/1/3/0/4/130483869/97107711950c.pdf
    • http://www.karandefallon.com/uploads/1/3/0/9/130968994/5568687.pdf
    • http://www.belovedgoodsshop.com/uploads/1/3/0/8/130873843/508255.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_off00006fca.bin
979dfafc574e25c1d785d12cc55fbd0fc955d03194a51c56a2e8913942348665		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCA 8368 bytes

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