Malicious PDF — malware analysis report

Static analysis result for SHA-256 32ebdc5d2e1e84ee…

MALICIOUS

PDF

37.2 KB Created: 2020-03-20 12:30:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: e88d1145aadf5f11da909551b8e484b7 SHA-1: f04acced73524b413e293578acc25af0cea944ff SHA-256: 32ebdc5d2e1e84eef830b09a9bc0295980ee36d8a3fdf5f89324b7ac239ac023
96 Risk Score

Malware Insights

MITRE ATT&CK
T1598 Gather Victim Identity Information T1204 Malicious Link

The PDF document contains a large number of external links to other PDF files hosted across various domains. This behavior is indicative of a link farm or a distribution mechanism for further malicious content. The ML classifier strongly flagged this sample as malicious, supporting the suspicious nature of the embedded links.

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://smartgtrack.com/uploads/1/3/0/8/130874439/130874439.html#tipos+de+volumenes+respiratorios
    • http://volumesalon.me/uploads/1/3/0/5/130551962/dd94bb3d85de7.pdf
    • http://travelingtobudapest.com/uploads/1/3/0/8/130813668/5063576.pdf
    • http://dennergroup-mobile.com/uploads/1/3/0/6/130639855/lemitutarubikina.pdf
    • http://www.pembrokeshirenaturalburials.co.uk/uploads/1/3/0/6/130603822/lumopupiwuju_wubofofoxevir_nuvalo_tepowilexe.pdf
    • http://duhameleducationinitiative.org/uploads/1/3/0/6/130603956/1742e.pdf
    • http://jorgenrufner.org/uploads/1/3/0/6/130603725/wufonajivowiv.pdf
    • http://najeecreations.ca/uploads/1/3/0/5/130539227/8184163.pdf
    • http://www.pearlstreetsalonandspa.com/uploads/1/3/0/5/130540176/7876607.pdf
    • http://doodledesignsandrhymes.com/uploads/1/3/0/3/130379297/jekajabizod-vetada-vogosadijupe-sokat.pdf
    • http://meridaanderson.com/uploads/1/3/0/2/130288481/99a28b.pdf
    • http://tallysmotors.com/uploads/1/3/0/8/130814176/8993733.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_off000068bd.bin
d77b91fe0bbcbfac6a52b76079b4eb52462c96077f5c34075f4ffd05535efbe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68BD 8540 bytes

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