Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb244f19f9b4fcd…

MALICIOUS

PDF

44.8 KB Created: 2020-03-29 06:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 6536daa781392ab30514a161cd2053b7 SHA-1: 156120f722ec1eaa427da563f11778ad2a684e84 SHA-256: acb244f19f9b4fcdb6b0953b4bb38ace6e69a5234691e20b1e1c3b28ab9f883e
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a method to distribute malicious content indirectly. The primary heuristic identified a 'PDF_SEO_LINK_FARM' which strongly suggests this is the intended functionality. No scripts were extracted, and the document body content is largely unreadable, making it difficult to determine a more specific purpose beyond link distribution.

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://greenwolfverticalfarm.com/uploads/1/3/0/6/130639251/130639251.html#como+meditar+en+tu+casa PDF link annotation
    • http://morwennabrady.com/uploads/1/3/0/9/130969281/60272d9.pdfIn PDF document text
    • http://makeyourownscent.co.uk/uploads/1/3/1/4/131407687/nixagizi.pdfIn PDF document text
    • http://www.danieldifranco.net/uploads/1/3/0/6/130604656/7522858.pdfIn PDF document text
    • http://elizabethnjplumbers.com/uploads/1/3/0/8/130813524/de1d502501e12df.pdfIn PDF document text
    • http://tbndesigns.com/uploads/1/3/0/5/130588864/7dba730.pdfIn PDF document text
    • http://symbioticdiet.com/uploads/1/3/0/6/130605253/3160853.pdfIn PDF document text
    • http://www.wedoinsurance.com/uploads/1/3/0/3/130312953/5687512.pdfIn PDF document text
    • http://wetember.com/uploads/1/3/0/6/130604150/2643423.pdfIn PDF document text
    • http://normacowie.ca/uploads/1/3/0/3/130323219/2d851ee2.pdfIn PDF document text
    • http://www.fbsaccounting.net/uploads/1/3/0/4/130488312/sarewedumugek.pdfIn PDF document text
    • http://myoshiashaw.com/uploads/1/3/0/6/130622009/devewi.pdfIn PDF document text
    • http://tructable.com/uploads/1/3/0/5/130590158/1431abbcd86.pdfIn PDF document text
    • http://faizemadina.com/uploads/1/3/0/8/130814030/fesakopikuve.pdfIn PDF document text
    • http://northwestskinscience.com/uploads/1/3/0/5/130588452/1c97fafc4a3f58.pdfIn PDF document text
    • http://hbys.services/uploads/1/3/0/5/130539265/magerudaxonobuse.pdfIn PDF document text
    • http://innovationfirstsolutions.net/uploads/1/3/0/2/130288887/nosiwogobeke_revifa_pawagawimatunej_lumosonuzibek.pdfIn PDF document text
    • http://www.doingeasybusiness.org/uploads/1/3/0/2/130287937/forutuzisot_xunurumipe.pdfIn PDF document text
    • http://ozzysracing.com/uploads/1/3/0/5/130545333/d960001cf353.pdfIn PDF document text
    • http://131-bonus.site/uploads/1/3/0/4/130483537/2366141.pdfIn PDF document text
    • http://boystownseries.com/uploads/1/3/0/6/130620282/c582dca.pdfIn PDF document text
    • http://thailandsbestnavarre.com/uploads/1/3/0/5/130540661/f7d631bb.pdfIn PDF document text
    • http://followyourdreamsbrasil.org/uploads/1/3/0/4/130435532/foxitoz_zobup_vomulexokiso_gegozi.pdfIn PDF document text
    • http://diasporawearuk.co.uk/uploads/1/3/0/4/130436147/3308656.pdfIn PDF document text
    • http://michiganlegalmalpracticequestions.com/uploads/1/3/0/4/130476014/935c7cd2a.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 1

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_off00008453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8453 8788 bytes
SHA-256: 499203008a79160128e79c959654170b5f49bab51b13c218b1e769de46010374

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