Malicious PDF — malware analysis report

Static analysis result for SHA-256 d296459fbb03a83e…

MALICIOUS

PDF

43.4 KB Created: 2020-03-30 02:07:47 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 29dd9dc3ae7b86cb85de0367c05c0d86 SHA-1: 49bd0d9a4ef47a39863012a55ab9816003c39e3a SHA-256: d296459fbb03a83efb7576f3044652d57f16222d392c8df585d0f88d9e304106
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, many of which point to PDF files with numeric or generic slugs on various domains. The document body itself contains the text 'Ejemplos de conjunciones subordinantes temporales' and includes URLs, suggesting a lure to a link farm or SEO spamming operation. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm.

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://www.xmo1.com/uploads/1/3/0/5/130545475/130545475.html#ejemplos+de+conjunciones+subordinantes+temporales PDF link annotation
    • http://tlcacuenergetics.com/uploads/1/3/0/3/130379959/gemimipise.pdfIn PDF document text
    • http://roucekpartners.com/uploads/1/3/0/6/130639906/gogotaveni_debunedate_pigedemege.pdfIn PDF document text
    • http://mwvhc-nh.org/uploads/1/3/1/4/131406837/0647f9de2fd5.pdfIn PDF document text
    • http://tonimagsaysay.com/uploads/1/3/0/7/130776817/4223815.pdfIn PDF document text
    • http://hbcommunitymortgage.com/uploads/1/3/0/5/130589264/boluwegolupo.pdfIn PDF document text
    • http://suburbanwoodsman.com/uploads/1/3/1/0/131070149/875e45126a9d9.pdfIn PDF document text
    • http://michaelamacpherson.com/uploads/1/3/1/4/131453565/jojemu.pdfIn PDF document text
    • http://maltaescapes.com/uploads/1/3/0/9/130969435/8838206.pdfIn PDF document text
    • http://novamedia.dk/uploads/1/3/1/3/131380729/31375.pdfIn PDF document text
    • http://mcsightco.com/uploads/1/3/0/4/130477007/sovutevesodu.pdfIn PDF document text
    • http://com-unlocked-valid-account.com/uploads/1/3/1/3/131398455/dasemonas.pdfIn PDF document text
    • http://joyceknock.com/uploads/1/3/0/5/130589244/mevikep.pdfIn PDF document text
    • http://carlandrewsandassociates.com/uploads/1/3/0/9/130969923/8fdf21c3ba2.pdfIn PDF document text
    • http://jamesferris.ca/uploads/1/3/0/4/130483050/d25aea.pdfIn PDF document text
    • http://ashleynboyd.com/uploads/1/3/0/7/130738708/wuxij_widej_jizagewaret.pdfIn PDF document text
    • http://simplymagicaljewelry.com/uploads/1/3/0/6/130621890/povidetez_lukupakefev.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007443.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7443 8844 bytes
SHA-256: dfd1ffddb5ee0458bbabab4b13a44a125b7b882764b0c257271a699f1fddbb3b
font_01_sfnt_off00009450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9450 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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