Malicious PDF — malware analysis report

Static analysis result for SHA-256 689801026659955c…

MALICIOUS

PDF

44.2 KB Created: 2020-04-12 04:52:02 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-08-25
MD5: a3f7bee49eeb29684803526f5a288110 SHA-1: fdd2873d4ce924742a393aef195e06e557579c4c SHA-256: 689801026659955c7db05fc9f798332d1507003f1e04008edacfbed6a2ebefeb
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'link farm' by heuristics. The embedded document body text, though heavily obfuscated, contains URLs that are also present in the list of extracted URLs. This suggests the primary purpose is to direct users to a network of websites, potentially for SEO manipulation or to serve further malicious content. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://diaryofacampingdiva.com/uploads/1/3/1/1/131164067/131164067.html#matriz+de+rotacion+robotica+ejemplos PDF link annotation
    • http://karimascrafts.com/uploads/1/3/1/0/131070574/e2705724.pdfIn PDF document text
    • http://maddywoodman.com/uploads/1/3/1/4/131453015/sudujopedoxevebetu.pdfIn PDF document text
    • http://ebnerturnings.com/uploads/1/3/1/4/131438242/vegoxosadesas-rusafopu-sobesupoda-vepan.pdfIn PDF document text
    • http://mrsduganshomeroom.com/uploads/1/3/0/4/130476981/tezutigalekuzefusa.pdfIn PDF document text
    • http://abouttrees.info/uploads/1/3/0/4/130488213/7226541.pdfIn PDF document text
    • http://safecitysecurity.com/uploads/1/3/0/5/130542770/6694993.pdfIn PDF document text
    • http://phoenixservicedapartments.com/uploads/1/3/1/3/131380623/22d5b2.pdfIn PDF document text
    • http://koio.com/uploads/1/3/1/3/131398453/zatudej-fetejexu-vemisem.pdfIn PDF document text
    • http://codingfordocs.com/uploads/1/3/0/5/130551349/71e5fb00e3783.pdfIn PDF document text
    • http://rezervacie.leoncentrum.sk/uploads/1/3/0/3/130379479/873d66e23.pdfIn PDF document text
    • http://integraltrainingassociates.com/uploads/1/3/1/4/131455621/nukudalasupizagoj.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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 5

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_off00006320.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6320 9228 bytes
SHA-256: c9f03febba3462c89cb79be2cb88ab99712edc848fde6a26ab1a734939f2f53b
font_01_sfnt_off000084ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AD 2888 bytes
SHA-256: 3008541fd58961cbbc60c81e19e2eeeb762db10e23b622b858aecb32e6486483
font_02_sfnt_off00008efc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFC 16040 bytes
SHA-256: 319f9c996375511bbe969d0b76506a2162f7d522988cd2631b41a5a1e417b94d

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