Malicious PDF — malware analysis report

Static analysis result for SHA-256 7edc49ce0602ff8d…

MALICIOUS

PDF

27.8 KB Created: 2020-04-30 19:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f9a29ebc8a37d31f5bef7b535515b92c SHA-1: 4716b42f634c7c705b7f53618a08ce3696a1b840 SHA-256: 7edc49ce0602ff8d32b443b5baf8d34efb3ee28f74c5023e6d571e3d974a5832
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Phishing: Spearphishing Attachment T1204.002 Malicious File: Malicious Link

The PDF file was flagged by a machine learning classifier as malicious. It contains a significant number of external links, a technique often used for SEO manipulation or to redirect users to malicious content. The presence of multiple PDF links hosted on various domains suggests a link farm or a distributed redirection infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://bartolomeilaw.com/uploads/1/3/1/3/131398144/131398144.html#falling+skies+the+game+trophy+guide
    • http://thenortheasthandmadefair.com/uploads/1/3/0/7/130775034/tikirarodiwuki.pdf
    • http://staceylytle.com/uploads/1/3/0/5/130588954/kovor.pdf
    • http://avenuesacademics.net/uploads/1/3/0/7/130739381/kubowem-nitawu-kadetum-devabetulapavo.pdf
    • http://dtailspetboutiquespa.com/uploads/1/3/0/7/130740524/dutub.pdf
    • http://flexosupply.com/uploads/1/3/0/3/130323957/6949785.pdf
    • http://towprovo.com/uploads/1/3/0/5/130545954/ladijitojalak.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_off00004879.bin
5c41332c34e09d6b6cdc72a7bd5afeb6c078a3f62c047f985f3fa37c4c834983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4879 6980 bytes

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