Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20c14ca6a4c6dd8…

MALICIOUS

PDF

39.8 KB Created: 2020-04-05 08:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1f1999f2d17afe1f96a2544a1dcf93ce SHA-1: 797df84e939ea7bcc3d2683a9487c1aa20b3a67a SHA-256: a20c14ca6a4c6dd84ba515b4c7aa122cf70f603fbcef593becf44ce4af56d3b2
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, though partially corrupted, contains a reference to '10 normas de convivencia en el aula en ingles' and includes numerous URLs pointing to PDF files hosted on various domains. This suggests the document's primary purpose is to direct users to a network of external sites, likely for SEO manipulation or to serve as a distribution point for further malicious content.

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://pridelawncareinc.com/uploads/1/3/0/9/130969312/130969312.html#10+normas+de+convivencia+en+el+aula+en+ingles
    • http://makeupbymel.org/uploads/1/3/0/2/130287424/pipejunumoweg.pdf
    • http://cofgreens.com/uploads/1/3/0/2/130273735/8112323.pdf
    • http://model3guide.com/uploads/1/3/1/0/131070178/2d2fe9adf8c.pdf
    • http://artfeedshunger.co/uploads/1/3/0/5/130589078/5971238.pdf
    • http://deluxedancemovement.com/uploads/1/3/0/5/130590353/9749739.pdf
    • http://spookybfilms.com/uploads/1/3/0/3/130379466/52b62.pdf
    • http://dynastyrenovations.com/uploads/1/3/0/4/130489475/200237cb67f.pdf
    • http://advancedmedicalgroup.org/uploads/1/3/0/3/130313463/topifabevomev_rifero.pdf
    • http://stanpleinair.com/uploads/1/3/0/7/130739814/f7cdacff1e4f.pdf
    • http://gr8waterinc.com/uploads/1/3/0/5/130544826/1bef54b7fd.pdf
    • http://schaepergoalkeeping.com/uploads/1/3/0/8/130813496/6289017.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_off000071a8.bin
ea5731c34005ec9b9ce1c04e1c11afb7b925e78cc48dd80104fb645ae1d9f74b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71A8 8376 bytes

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