Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2cad26da7d04cc…

MALICIOUS

PDF

41.8 KB Created: 2020-10-07 20:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 46e424582ae73475da9b9130ff64d8cb SHA-1: 7217a6b49d7da78602ac25902a1fe72d0b33d73a SHA-256: 1c2cad26da7d04cca3547f871f7c24a2f7a32a940df2b5b40803b4b3aee92aef
124 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one identified as a known malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector, suggesting an attempt to disguise the malicious destination. The ML classifier strongly indicates malicious intent, likely to redirect users to phishing or malware sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=lavyrle+spencer+books+pdf In PDF document text
    • http://files.thenchtuk.org/uploads/1/3/1/6/131606839/filedewimuv.pdfIn PDF document text
    • http://files.skipcrowther.com/uploads/1/3/0/8/130814007/gonefufa_vofiwi.pdfIn PDF document text
    • http://gowapika.remakingourschoolsforthe21stcentury.com/uploads/1/3/2/7/132712593/5766483.pdfIn PDF document text
    • http://weredida.twoopenhearts.com/uploads/1/3/1/4/131438114/cabebcd0dbc25e6.pdfIn PDF document text
    • https://site-1040618.mozfiles.com/files/1040618/rixubafanenisa.pdfIn PDF document text
    • https://site-1039456.mozfiles.com/files/1039456/ladejep.pdfIn PDF document text
    • https://site-1036935.mozfiles.com/files/1036935/leparigamabewikefane.pdfIn PDF document text
    • http://files.bluecactustriathlonclub.com/uploads/1/3/0/7/130775970/depekedixagonot_perojod_mubog.pdfIn PDF document text
    • http://tumado.msmspe.com/uploads/1/3/0/8/130874320/1536745.pdfIn PDF document text
    • http://files.christcentredchildbirth.com/uploads/1/3/0/7/130775403/4356388.pdfIn PDF document text
    • http://xufegaxup.christianiaartgallery.com/uploads/1/3/1/3/131383949/5847501.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a27c9135-900c-457e-96fa-ac1c71bc98ac/9457250999.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0233ae-fade-4c4f-8fa8-dd2720928201/68030566966.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff4df887-8724-4078-9fb2-aa7ad2bea8bf/69361233228.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_off0000662e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x662E 5456 bytes
SHA-256: 612550df8fbdcc9c5fadbfc18804f490f96a9163eb501fbe8d404a5e6734dcbb
font_01_sfnt_off000078d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D5 9908 bytes
SHA-256: c6e2b21f2a9969c7b2d703feed1658b30ee9eb0869e6b36ae52ffddffd2f5bfc

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