Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edaf65e7f196dbd…

MALICIOUS

PDF

36.7 KB Created: 2020-04-12 13:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e354983c564ec56b4bde53bb1a40cf43 SHA-1: b07c82ddf225e750b3e46fb4ff7eb7ae25c045d8 SHA-256: 6edaf65e7f196dbd960236acad3ed26e7458548412e1fdaf87f2c8f690010b94
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains a URL that mirrors the title 'Problemas de resta para cuarto de primaria resueltos', indicating a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://bytecubed.io/uploads/1/3/0/5/130551166/130551166.html#problemas+de+resta+para+cuarto+de+primaria+resueltos
    • http://greenwayprime.com/uploads/1/3/0/5/130589166/xenopidifelunijomumu.pdf
    • http://style407.com/uploads/1/3/1/0/131071256/latetim.pdf
    • http://teddynasr.com/uploads/1/3/0/6/130604879/9276561.pdf
    • http://delisur.net/uploads/1/3/0/2/130274145/2200938.pdf
    • http://tgi420.ca/uploads/1/3/0/9/130969003/sotivasutawitaz.pdf
    • http://hometechbms.com/uploads/1/3/1/4/131413222/6041184.pdf
    • http://bnbsports.net/uploads/1/3/1/0/131070325/1705007.pdf
    • http://fitnessbodysport.com/uploads/1/3/1/3/131398573/0a521815f02.pdf
    • http://saudiarmys.com/uploads/1/3/1/1/131163561/jenunaru.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_off000064a0.bin
5264c1a44dc4b9d40e7e1b2617a2e62df41e038be2735195959fb1ab307d930e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64A0 8824 bytes

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