Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b8b9e39fc5e2df…

MALICIOUS

PDF

41.0 KB Created: 2020-03-24 08:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d58a4ba4ea9401af42bb1ed00a9e2e13 SHA-1: 8549f334fe3da4b530ed0d4ed5e641fd8aced782 SHA-256: f0b8b9e39fc5e2df00bfdc45f8d5a250b44466d8949b81b1b88b1ed90b51a024
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body also contains a URL that points to a potentially malicious resource. The primary function appears to be directing users to a network of linked content, likely for malicious SEO or to serve as a distribution point for further malware. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://shopbelfast.info/uploads/1/3/0/6/130620450/130620450.html#pl+sql+developer+oracle+client
    • http://instegratedcorrosion.com/uploads/1/3/0/4/130483513/vakan-dabojezavisava-fuzilozura.pdf
    • http://mtdistrictlwml.com/uploads/1/3/0/7/130776126/96b70315016a.pdf
    • http://mitchgallagherband.com/uploads/1/3/0/9/130969762/a328f21472e.pdf
    • http://ticketmenow.us/uploads/1/3/0/5/130589320/desavixurukafi.pdf
    • http://milgens.com/uploads/1/3/0/6/130639980/5419696.pdf
    • http://35knotsbrasil.com/uploads/1/3/0/7/130776159/dopalanisonoxavales.pdf
    • http://campkinky.com/uploads/1/3/0/5/130589433/biwulagakosiwones.pdf
    • http://mrsmichelebrown.com/uploads/1/3/0/2/130289277/xekasidigerabod.pdf
    • http://www.jonascain.net/uploads/1/3/0/6/130639896/1233659.pdf
    • http://eliteacousticinteriorsllc.com/uploads/1/3/0/6/130605094/3002339.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_off00007757.bin
370aff9f9f243d2d3a330ba78e4de8853065476b23a238795c1a3e9cbed54671		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7757 8380 bytes

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