Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c17f72038e1295b…

MALICIOUS

PDF

44.1 KB Created: 2020-06-17 05:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: b141c0ab29fef37e12bfaa6b6a5d0ea0 SHA-1: 3329ded08226e1dfac8567a903037ae51595dbab SHA-256: 0c17f72038e1295b26743916a730a9380b030645c284778acd78fdb0edad3d73
96 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded external links to other PDF files across various domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'Paper balls anleitung pdf' and references the wkhtmltopdf tool, suggesting a potential lure or content generation mechanism. The primary function appears to be directing users to a link farm, likely for SEO manipulation or to distribute malicious payloads.

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://1lh.undesirable.us/uploads/1/3/1/8/131857294/131857294.html#paper+balls+anleitung+pdf PDF link annotation
    • http://webmail.mistwoodfarms.com/uploads/1/3/1/3/131382497/zojagabiwofinerifip.pdfIn PDF document text
    • http://hostmaster.odontoiatriaguadagno.it/uploads/1/3/0/9/130969504/ximeterusix-pizonag-likedamo.pdfIn PDF document text
    • http://hypnotherapy-chesterfield.com/uploads/1/3/1/3/131398525/bazagasisawuzal.pdfIn PDF document text
    • http://mynewdomainlive.com/uploads/1/3/0/6/130604667/6533749.pdfIn PDF document text
    • http://mychickadeesfuntasticnest.com/uploads/1/3/0/9/130969221/446e15ca807.pdfIn PDF document text
    • http://thehillsbrokerageservices.net/uploads/1/3/1/3/131397934/4899224.pdfIn PDF document text
    • http://thisoklahome.com/uploads/1/3/0/4/130491599/495807.pdfIn PDF document text
    • http://mail.deligleba.com/uploads/1/3/0/6/130639438/b63bfa42.pdfIn PDF document text
    • http://mcpublications.com/uploads/1/3/0/5/130588221/3930663.pdfIn PDF document text
    • http://mx.elgaby.com/uploads/1/3/1/6/131636707/f2496bb978.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 5120 bytes
SHA-256: 6b489b89b20fd590cae79deb282a42084ad070d79cbf55ecf9a9b30c58457f20
font_01_sfnt_off000076ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76AC 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00007f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F39 10836 bytes
SHA-256: 5669ce0fe555bf31f25612e26cca980b44536fbcf98a3169ec0fa2abe13fe86f

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