Malicious PDF — malware analysis report

Static analysis result for SHA-256 8634070d61a65583…

MALICIOUS

PDF

43.2 KB Created: 2020-04-11 20:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ae808d9d24d771a19db5d935d013e485 SHA-1: 1542861859ba5f9d2bff7b0ac662686fc894b902 SHA-256: 8634070d61a65583aca4619b2a76e6bb9811748fb76e03b7e9fef9d271eb30a3
94 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links to other PDFs hosted on various domains, indicative of a link farm or SEO abuse. The document body, though partially corrupted, contains references to the URLs found in the heuristics, suggesting a deliberate attempt to direct users to these external resources. The primary attack pattern appears to be the distribution of malicious content or traffic generation through a network of SEO-optimized PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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
  • 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://makevotingmatter.net/uploads/1/3/0/4/130478760/130478760.html#teorias+de+la+comunicacion+social+segun+autores
    • http://selfservefurniture.com/uploads/1/3/0/5/130550756/2710582.pdf
    • http://chanitamir.com/uploads/1/3/0/3/130323803/jiraxowibejobit_kaxebinunikupop.pdf
    • http://ips8presentation.com/uploads/1/3/0/5/130590687/xukamif.pdf
    • http://arbor-publishing.com/uploads/1/3/0/8/130874669/wimeri.pdf
    • http://gothamknightsllc.net/uploads/1/3/1/1/131164002/5723571.pdf
    • http://empowerlearningcenter.com/uploads/1/3/1/3/131398174/gutasimorozojakofat.pdf
    • http://seniorlifestylesmarketing.com/uploads/1/3/0/9/130969747/8634345.pdf
    • http://genevaantiquemarket.com/uploads/1/3/0/6/130603763/b0a7fbba1dd8058.pdf
    • http://westbrookadventures.com/uploads/1/3/0/6/130639946/nukonewux-jawemumobelot-jenovanapopat.pdf
    • http://solitegroup.com/uploads/1/3/1/0/131070279/7f63b44.pdf
    • http://postnatal-counselling.com/uploads/1/3/1/4/131409275/vusuworojibite-wozer-nizanakoxemaf.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_off0000822e.bin
b6256589d017f07f2edf547a99754fea3f9262280fb3c929616092c088ce92bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x822E 8284 bytes

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