Malicious PDF — malware analysis report

Static analysis result for SHA-256 4741fb0de9536e1f…

MALICIOUS

PDF

40.6 KB Created: 2020-03-21 02:28:33 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 90594a52deb7933ea968dfa8dc039ea1 SHA-1: ec57a71fcac355b2987e155a83d38d330b18de06 SHA-256: 4741fb0de9536e1f23f5198a03480dad3955e0d7318255e68babcd1e9b9c6602
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a PDF link farm. The primary URL points to a page discussing healthy eating, likely a lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting a coordinated effort to direct traffic. The document body contains garbled text and some of the extracted URLs, reinforcing the link farm tactic.

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://colorado-es.com/uploads/1/3/0/6/130604020/130604020.html#alimentos+que+ayudan+a+eliminar+higado+graso PDF link annotation
    • http://theproccast.com/uploads/1/3/0/3/130313671/9319550.pdfIn PDF document text
    • http://meminpinguin.com/uploads/1/3/0/6/130639646/bewerupurozitida.pdfIn PDF document text
    • http://promasterremodelllc.com/uploads/1/3/0/6/130639583/a78d88c3e95cf.pdfIn PDF document text
    • http://hostmaster.classicaldigitalphotography.co.uk/uploads/1/3/0/6/130639896/5b0b7d15.pdfIn PDF document text
    • http://zs-development.com/uploads/1/3/0/7/130738555/pedawuxowipegiwofeme.pdfIn PDF document text
    • http://atlbloggers.com/uploads/1/3/0/6/130604196/3581733.pdfIn PDF document text
    • http://www.reikisacredtimebristol.com/uploads/1/3/0/6/130620244/sujamaramon.pdfIn PDF document text
    • http://sharonmotel.com/uploads/1/3/0/2/130288364/5932101.pdfIn PDF document text
    • http://www.ordefensesupport.com/uploads/1/3/0/5/130551809/vonitid.pdfIn PDF document text
    • http://ashleyrisacher.com/uploads/1/3/0/6/130639862/zezojekikojuba-xorelas-govimomigi.pdfIn PDF document text
    • http://as-sto.de/uploads/1/3/0/6/130639784/5254681.pdfIn PDF document text
    • http://thehavens.club/uploads/1/3/0/7/130775198/091c685c.pdfIn PDF document text
    • http://mentortreecare.com/uploads/1/3/0/5/130541656/ef91930a.pdfIn PDF document text
    • http://artesanoflooring.com/uploads/1/3/0/6/130639068/9625612.pdfIn PDF document text
    • http://gingerbreadhouseclc.com/uploads/1/3/0/6/130639068/b3b6285e.pdfIn PDF document text
    • http://gadgeriffic.com/uploads/1/3/0/6/130639603/manofi-mulemisubufa-valuvevimepomoj-dasobiwaxorik.pdfIn PDF document text
    • http://chipinc.org/uploads/1/3/0/5/130545884/7365043.pdfIn PDF document text
    • http://neurologiccare.com/uploads/1/3/0/8/130874563/64f94dbaaa04d4.pdfIn PDF document text
    • http://riverroadmercantile.com/uploads/1/3/0/6/130603743/mivolumaz_vigosovizanadu_minirupakozorin_polewobowo.pdfIn PDF document text
    • http://mta-sts.mail.bhdesignstyle.com/uploads/1/3/0/4/130488539/firolezujaxeluxisi.pdfIn PDF document text
    • http://cpanel.riavoice.com/uploads/1/3/0/8/130874631/befig.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_off00007494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7494 8212 bytes
SHA-256: e196b212c2a77a9960c2d87acafb67b312aae7bead10ec4386ae62324f838a7f

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