Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a1a3b2f9b395a1…

MALICIOUS

PDF

80.3 KB Created: 2021-03-02 02:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3af0119104f3b0ca170c9aa9c925f9e7 SHA-1: 5484657fec5753f2256a3f77a1b8860598ac1e4b SHA-256: b5a1a3b2f9b395a1040a1fedf1426d14108f47e009029fcd945ed9bbf891ce75
66 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to external websites. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL identified is https://seumenha.ru/wix?keyword=cry+of+the+last+unicorn+pdf, which appears to be a lure for users searching for specific content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=cry+of+the+last+unicorn+pdf PDF link annotation
    • http://kigurumi.org/78422973438soa81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393637/normal_5ffd5a114e22b.pdfIn PDF document text
    • https://gonotelavekufuf.weebly.com/uploads/1/3/4/6/134615299/6125248.pdfIn PDF document text
    • http://thedefenseforge.com/19580781287snp4x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408355/normal_603946b2d1ee1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456985/normal_5fefe7cdcf3ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408871/normal_601830417306f.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/sazixipame/wumifujikanig.pdfIn PDF document text
    • http://fasitefikiseli.rf.gd/vaviwuzej.pdfIn PDF document text
    • http://wazuvit.rf.gd/acronis_true_image_free_version.pdfIn PDF document text
    • http://namavorudil.epizy.com/61864921297.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/house_on_haunted_hill_2_movie.pdfIn PDF document text
    • http://wuluzakasuw.epizy.com/47947764444.pdfIn PDF document text
    • http://logilifi.epizy.com/free_antivirus_app_for_android_phones.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/59851789940.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_off0000fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC93 5248 bytes
SHA-256: ba30a78df425db09cb14e39bfa432ffc991bebc1930c39df4b29a881eea7ee7a
font_01_sfnt_off00010e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6F 11148 bytes
SHA-256: d93b6c9093f75745ce28625869ec98a8ba15fe4b9ac37162631e98600371eb39

Open this report in the interactive analyzer, or submit your own file for analysis.