Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0a088256fcebde…

MALICIOUS

PDF

39.1 KB Created: 2020-04-16 09:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 0bca946098f8ed6fe23828597cdbda67 SHA-1: 50ca88301272df51c2c97b8a1326d2a44e14ce4f SHA-256: 2e0a088256fcebde20ca92150304a4adb05b20a68e4c1570fa0b0722f0f7ab21
94 Risk Score

Malware Insights

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

The PDF sample was flagged by an ML classifier with high confidence. It contains a significant number of external links pointing to various domains, indicating a link farm or SEO poisoning attempt. The embedded URLs are likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://reva.solutions/uploads/1/3/1/4/131407846/131407846.html#a%C3%A7%C4%B1sal+ivme+form%C3%BCl%C3%BC
    • http://jedktravel.com/uploads/1/3/1/4/131454269/vesokerurukozi-joxer-lupozab.pdf
    • http://blazingblazers.com/uploads/1/3/0/5/130588307/febup.pdf
    • http://alexascleaningservices.com/uploads/1/3/0/5/130540219/c611ceb84aa9.pdf
    • http://garagepro.org/uploads/1/3/0/5/130590338/zedidizom.pdf
    • http://ouachitavacation.com/uploads/1/3/0/5/130589098/liriparepodego.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000628e.bin
5c48ff447fa26c6f2a75a0da4574264402ecf9c41a8ce9a86b3ddd5be2f08697		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 9508 bytes
font_01_sfnt_off000083f5.bin
30c0bfb6e3e30a71be41979e86dd3a5512cc9b50d81fbdd04975224399bef3c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83F5 3088 bytes

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