Malicious PDF — malware analysis report

Static analysis result for SHA-256 e593b41f4475ad74…

MALICIOUS

PDF

38.7 KB Created: 2020-06-02 07:43:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 3b59e37d9a968d1d1ed8bfc67062fa4d SHA-1: 310c8492cad54e71be6b724db0205c8ff4f2e908 SHA-256: e593b41f4475ad74b2afd348e35e9fc92e797982a67c6ea045693c72dd206272
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a link farm or SEO manipulation scheme, embedding a large number of external links to other PDF documents. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of numerous external links. The primary IOCs are the various URLs embedded within the document, which are likely used to direct users to potentially malicious or misleading content.

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://lionambassadorsfamilyweekend.com/uploads/1/3/0/8/130813399/130813399.html#toplumsal+cinsiyet+ve+iktidar+connel PDF link annotation
    • http://gabriel-stein.com/uploads/1/3/0/7/130738696/2311279.pdfIn PDF document text
    • http://jacleaningservices.net/uploads/1/3/0/5/130589318/2451550.pdfIn PDF document text
    • http://pigskinpolitics.com/uploads/1/3/0/3/130323996/4834195.pdfIn PDF document text
    • http://daffo-diehlphotography.com/uploads/1/3/1/4/131409546/rikujonutabe.pdfIn PDF document text
    • http://madisonteethwhitening.com/uploads/1/3/0/7/130776056/7e79ef212891d4.pdfIn PDF document text
    • http://thebunsandbites.com/uploads/1/3/0/6/130620747/023c5de0de1.pdfIn PDF document text
    • http://themusicdeptband.co.uk/uploads/1/3/1/4/131453084/3461192.pdfIn PDF document text
    • http://rustorbustboutique.com/uploads/1/3/0/4/130489248/91116cd4.pdfIn PDF document text
    • http://lionambassadorsfamilyweekend.com/uploads/1/3/0/8/130813399/terms.htmlIn PDF document text
    • http://lionambassadorsfamilyweekend.com/uploads/1/3/0/8/130813399/dmca.htmlIn PDF document text
    • http://lionambassadorsfamilyweekend.com/uploads/1/3/0/8/130813399/policy.htmlIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lotodirod.files.wordpress.com/2020/05/11548621610.pdfIn PDF document text
    • https://porugisi.files.wordpress.com/2020/05/warewesigejekuguparaxu.pdfIn PDF document text
    • https://bujamabak.files.wordpress.com/2020/05/80306862986.pdfIn PDF document text
    • https://wajowobosub.files.wordpress.com/2020/05/37966378778.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C8 13636 bytes
SHA-256: 9eb875d130c6d738dbf43bbf14fd47d7f351e63ea42c386192a22e8db76e7fff

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