Malicious PDF — malware analysis report

Static analysis result for SHA-256 62f21862d6a5a29b…

MALICIOUS

PDF

30.2 KB Created: 2020-05-17 07:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1079fe8920ab3b488bf34a05a346152 SHA-1: 6535491a367c879db8ce7647ec008b63f353f261 SHA-256: 62f21862d6a5a29b5b56b554a0ec35e302c2a8ce7f6d262a71218a4f8211131a
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing sites. The embedded links are the primary IOCs, suggesting a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8871088-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8871088-0
  • 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://noble-craft.com/uploads/1/3/1/4/131408117/131408117.html#giorno%2527+s+theme+sheet+music+letters
    • http://customgiftchoices.com/uploads/1/3/0/9/130969559/efead7ed333329a.pdf
    • http://awakeky.com/uploads/1/3/0/4/130488934/vafotalakid.pdf
    • http://westboundmassage.com/uploads/1/3/0/4/130483469/lipubozinovaf_berix.pdf
    • http://redstreet-legalgolf.com/uploads/1/3/0/7/130740186/90e57e81.pdf
    • http://charleneswoboda.com/uploads/1/3/1/3/131384432/zakorenewonu_wipotuvuvew_zuten.pdf
    • http://discountdivanetwork.com/uploads/1/3/1/6/131636726/b8c5a21abf9.pdf
    • http://innosphere.be/uploads/1/3/0/7/130738823/8097159.pdf
    • http://cringlebarltd.com/uploads/1/3/0/5/130550921/womis.pdf
    • http://lizzarddesigns.com/uploads/1/3/1/3/131384359/muzibajorife_tobonet.pdf
    • http://heidihancock.com/uploads/1/3/0/7/130738979/dezudikozab-fomepasadamox.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_off00004b22.bin
ddba3b69496da79dc9369705e60d3abcd355d2896d88095353010c52d493ef67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B22 10400 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.