Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a9315826a0207b…

MALICIOUS

PDF

49.3 KB Created: 2020-03-23 03:26:46 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 94516042c9dee9e5f446dd2e6faa45a2 SHA-1: 09641a5e8014fccd228f45a8011e7356f8cfb0ff SHA-256: a2a9315826a0207b6fcd0de493853dc893643773c6ef90f3734251ae242f6415
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. The document body, though partially corrupted, contains the text 'Estilo de negociacion americano' and references to wkhtmltopdf, indicating it was likely generated programmatically. The primary intent appears to be directing users to a multitude of external URLs, potentially for SEO manipulation or to host further malicious content.

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://articsl.com/uploads/1/3/0/7/130739127/130739127.html#estilo+de+negociacion+americano PDF link annotation
    • http://broadwateradvertising.com/uploads/1/3/0/4/130488669/nakigux.pdfIn PDF document text
    • http://ccrewdogs.com/uploads/1/3/0/5/130543025/526053.pdfIn PDF document text
    • http://tylerjlewis.co.uk/uploads/1/3/0/5/130551057/4136220.pdfIn PDF document text
    • http://mygreekhouse.net/uploads/1/3/0/7/130739693/8509147.pdfIn PDF document text
    • http://www.louisvillefuneralservice.com/uploads/1/3/0/6/130621664/930115.pdfIn PDF document text
    • http://realedchat.com/uploads/1/3/0/6/130604086/zagopozefewevup.pdfIn PDF document text
    • http://family-love.daniellerosephotography.com/uploads/1/3/0/4/130476427/pimexotemat-rimivogurufu.pdfIn PDF document text
    • http://sugarmaplecharcoal.com/uploads/1/3/0/7/130775446/af5e02216b69db.pdfIn PDF document text
    • http://anthroup.com/uploads/1/3/0/2/130270747/cedb144d0c.pdfIn PDF document text
    • http://jingcaizuqiutouzhu.f18.ebkf.org/uploads/1/3/0/6/130605283/715644.pdfIn PDF document text
    • http://dalebrook.co.nz/uploads/1/3/0/2/130288986/nemexadejag_pipodezikun.pdfIn PDF document text
    • http://btyempireplus.com/uploads/1/3/0/8/130814058/1991905.pdfIn PDF document text
    • http://stuartskenephotography.co.za/uploads/1/3/0/7/130776002/gusumajo_jugaz_vomujagurofa.pdfIn PDF document text
    • http://worldmaco.com/uploads/1/3/0/7/130740130/0f23dba23d.pdfIn PDF document text
    • http://mmtaxandfinancial.com/uploads/1/3/0/6/130604508/tiporume-roluluvavi.pdfIn PDF document text
    • http://diasporawearuk.co.uk/uploads/1/3/0/5/130544539/mefurijuladitad.pdfIn PDF document text
    • http://nateberggren.com/uploads/1/3/0/6/130639082/1826558.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009859.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9859 8788 bytes
SHA-256: 5d9df58f0807cc0edf8d65780de408d1c1bd0372ad27a6c7616b658c167d4014

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