Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec1e29576e73cbd7…

MALICIOUS

PDF

38.4 KB Created: 2020-06-01 12:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbdd35fba799117ea402650592216afd SHA-1: 8c0dee7b2d71bcc5437eac02b1e47e5983ad4139 SHA-256: ec1e29576e73cbd7d59168fce30888ba9747e832e54ee33e02cfb6465978e620
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML_NYX_PDF_MALICIOUS heuristic strongly indicates malicious intent. The embedded URLs suggest a link farm or SEO spamming operation, potentially leading to further malicious content or phishing pages.

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://hembliss.com/uploads/1/3/2/3/132303315/132303315.html#dirt+devil+vacuum
    • http://skellytutoring.org.uk/uploads/1/3/0/2/130291676/jilivanezika.pdf
    • http://montanahollidayglass.com/uploads/1/3/1/6/131636983/2302290.pdf
    • http://ns2.ilehc.org/uploads/1/3/1/4/131454237/77493d97d.pdf
    • http://mayahairstonslampoetry.com/uploads/1/3/1/4/131438068/badenovexaleri.pdf
    • http://mail.breakthroughjunction.com/uploads/1/3/0/7/130739210/wuzebup_rowadewi.pdf
    • http://cocktelmenorca.com/uploads/1/3/1/4/131453041/5722311.pdf
    • http://cocktelmenorca.com/uploads/1/3/1/4/131453041/5
    • https://timowasufu57836677.files.wordpress.com/2020/05/91817877545.pdf
    • https://fisajisekik.files.wordpress.com/2020/05/58936771569.pdf
    • https://pozoxamifafu.files.wordpress.com/2020/05/43429421603.pdf
    • https://tafibenula.files.wordpress.com/2020/05/93656186800.pdf
    • https://vodolozex.files.wordpress.com/2020/05/28318365373.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_off00006b26.bin
ce928f1a3dee7bda362fc48f9f13aaa88517d8da87c22cb11f1715547db8b8ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B26 10236 bytes

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