Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b984263673676dd…

MALICIOUS

PDF

37.2 KB Created: 2020-03-25 05:56:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 57b1540d5b9fefdd627b4086a7faa10f SHA-1: 2a59d96e35e4b722ded3e8d12ff3d10bc36fe90f SHA-256: 0b984263673676ddb42cdd30f997a235da759bfdbfd4116535de2b90d7c164d8
96 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially obfuscated, also contains URLs pointing to external resources. The primary function appears to be directing users to a network of linked PDF files hosted on various domains, likely for SEO manipulation or to distribute further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

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://trapma.com/uploads/1/3/0/8/130874369/130874369.html#caracteristicas+del+genero+lirico
    • http://motherhoodmomentstowineabout.com/uploads/1/3/0/2/130270808/291a16ae3.pdf
    • http://ubuemail.com/uploads/1/3/0/5/130539092/boxilokeb.pdf
    • http://milkywayfarm.net/uploads/1/3/0/5/130588270/3228111.pdf
    • http://icolstudio.com/uploads/1/3/0/7/130776725/9ac6809f7d.pdf
    • http://mail.clevelandbouncer.com/uploads/1/3/0/5/130550915/paratixoma_ruzefavasixuv_pagusogo.pdf
    • http://www.electricianfalkirk.com/uploads/1/3/0/2/130289315/pubuwowubulog.pdf
    • http://boylepublichealth.com/uploads/1/3/0/7/130739895/77e0bfd4.pdf
    • http://autodiscover.impactchristianfc.com/uploads/1/3/0/6/130621383/visamorevufali_rovid_fiwokufen.pdf
    • http://buildprestige.com/uploads/1/3/0/2/130289630/1139240.pdf
    • http://okimages123.com/uploads/1/3/0/6/130604449/2457447.pdf
    • http://massimocapra.net/uploads/1/3/0/4/130488700/ec9b9177bb41bab.pdf
    • http://petsplayfull.com/uploads/1/3/0/2/130288626/2203335.pdf
    • http://www.summerhill455cnl.net/uploads/1/3/0/4/130476458/fegilefu.pdf
    • http://justjimmusic.com/uploads/1/3/0/6/130639215/domagimipuvubap.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_off00006a1a.bin
7e4abf187187ef548222e2e1b6215837f9f95256b14fe67293c1f17c8c29298b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1A 8136 bytes

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