Malicious PDF — malware analysis report

Static analysis result for SHA-256 06709dd5ceb2a559…

MALICIOUS

PDF

31.0 KB Created: 2020-04-12 15:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 96ad3fd42e33c6d56b7762f846747f31 SHA-1: 23ac4c338f941c33a1d9f136785dc1ff9ca47583 SHA-256: 06709dd5ceb2a55952cc14b2f149c252557efce22e358c48213e2bc86c049a20
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it likely exploits a vulnerability to execute code. The document contains a large number of embedded external links, suggesting a link farm or a method to redirect users to potentially malicious websites. The primary purpose appears to be the distribution of further malicious content or the exploitation of PDF vulnerabilities.

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-8197080-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8197080-0
  • 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://shopbelfast.info/uploads/1/3/1/3/131379544/131379544.html#mens+nike+acg+cycling+shoes
    • http://thessteam.net/uploads/1/3/0/4/130476981/5197896.pdf
    • http://starkravinmad.com/uploads/1/3/1/3/131398605/zitimazowapukib_lukozap_zusana_kobupaxo.pdf
    • http://blooddiamondsdrama.com/uploads/1/3/0/4/130483265/mudani.pdf
    • http://gamedayathleticwear.com/uploads/1/3/0/2/130271195/wevafape-purozajutamilaf-zepuwemosidubuj-wadizupidewadir.pdf
    • http://lacasadestark.com/uploads/1/3/0/2/130271096/aa8eb65f54b37b7.pdf
    • http://rowancodesigns.com/uploads/1/3/0/7/130776343/5779655.pdf
    • http://beachbarre.net/uploads/1/3/1/4/131438036/tesuzibilujorumuganu.pdf
    • http://perfecthybrid.net/uploads/1/3/0/5/130544147/bipevese.pdf
    • http://highlandmillsumc.com/uploads/1/3/0/7/130739185/7729136.pdf
    • http://versesandvows.net/uploads/1/3/0/6/130621484/totejubisoviwate.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_off000050a5.bin
3c13e3aa0633fc77bc58e3c24f3b9c6bea714e13dc11fdb8558a4edc1ab66987		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50A5 8280 bytes

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