Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca9b45a82026102…

MALICIOUS

PDF

41.1 KB Created: 2020-11-08 20:29:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56b6b5519bc6ef50d54440bca5732ed1 SHA-1: 18d904b054f911863e355eea15409d1ac614766b SHA-256: 5ca9b45a820261023dd58441c82c533d8f2fc85ffdb903d4070bc52e660816a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'life in colonial north carolina' and the malicious URL, suggesting a phishing or scam attempt. The presence of a malicious redirector link and a large number of external links indicates an attempt to drive traffic to potentially harmful 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 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.
  • 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/123?keyword=life+in+colonial+north+carolina
    • https://cdn-cms.f-static.net/uploads/4378151/normal_5f8b24eb9a8cd.pdf
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8b64cc1b51d.pdf
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f89e33173ee5.pdf
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f86f65dc4114.pdf
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f9750e7544bd.pdf
    • https://cdn-cms.f-static.net/uploads/4426695/normal_5fa28e8628cf4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/remeranexe/setewifujovupexokiwumadiz.pdf
    • https://s3.amazonaws.com/jagux/cerfa_attestation_assedic.pdf
    • https://xejigavo.files.wordpress.com/2020/11/waters_acquity_sample_manager_manual.pdf
    • https://bedirolipe.files.wordpress.com/2020/11/pictionary_word_list_difficult.pdf
    • https://s3.amazonaws.com/luramamelolem/84863655282.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000645e.bin
af52394947590545b746f1e5c54369972cda277d4e58118573017b77e098fc43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x645E 4732 bytes
font_01_sfnt_off00007475.bin
8f2647b2b672c3526f49fe70f780199506a00ca077612b060c9360d44cd5c353		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7475 10360 bytes

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