Malicious PDF — malware analysis report

Static analysis result for SHA-256 16eba4d168d2a427…

MALICIOUS

PDF

76.3 KB Created: 2021-02-15 04:49:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ed2e0264ed5e7021bbe7f1afb195a9a8 SHA-1: d2a18de9ba51023ded4adc0dc3dc1d2f7aa5c0d0 SHA-256: 16eba4d168d2a427d7efd06ec08c72ebf0038a3e8b2b6056e8441b5f973d09eb
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, a common tactic for SEO spam or phishing. The primary URL, 'https://seumenha.ru/wix?keyword=online+ms+paint+for+mac', suggests a lure to a potentially malicious website. While no scripts were explicitly extracted, the PDF structure and extensive linking indicate an attempt to redirect users, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://seumenha.ru/wix?keyword=online+ms+paint+for+mac PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458618/normal_6004daa0d0555.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_6022d8e7b65aa.pdfIn PDF document text
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/mivipefujukim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451750/normal_5fee6426767ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476577/normal_5ff3ce108dd59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480145/normal_5ffc0ec46a83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424953/normal_60104b0864ccf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417305/normal_5fe0cff92c2c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476288/normal_5fdb6ed540d71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476924/normal_5ff0c8a863b2d.pdfIn PDF document text
    • http://harkateine.fun/86079226856frgue.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381730/normal_5fd943dc44e94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393345/normal_6029abb05622f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/evermotion_archinteriors_vol_44.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEB 5188 bytes
SHA-256: 8ed86cb487981efb06999724759a96db97582e31f839d77099db4d760e80ad03
font_01_sfnt_off0001017b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1017B 10240 bytes
SHA-256: be7538a58a54aa494af63959accc9d2eeadb3bba465ee527f4bdd90833f6af00