Malicious PDF — malware analysis report

Static analysis result for SHA-256 e330dc8646b0d51e…

MALICIOUS

PDF

62.2 KB Created: 2020-11-07 15:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f7dbc6c61ba3b747614c9e46547812c7 SHA-1: 197f15235838fe0b0b1bfdb002ff77f8a3610c25 SHA-256: e330dc8646b0d51efbac88cfe84d01b8f550bda34cc20d2f5d7637ad6d0b4277
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains text related to a shooting center closing and the malicious URL, suggesting a lure for phishing or malware delivery. The presence of multiple external PDF links further supports a link farm or redirection strategy.

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=rockcastle+shooting+center+closing In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380887/normal_5f96c6b63962d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f979b2525e31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369630/normal_5f9193d50f923.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5f9bd125b0cab.pdfIn PDF document text
    • https://puwibovur.weebly.com/uploads/1/3/4/6/134639487/a9ce9330054.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/gajabedafot/ocarina_of_time_beta_quest_rom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86cdff95-5664-4df7-bff2-d83b73f5331e/desutadoxatajerasepolozib.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/owasp_code_review_guide.pdfIn PDF document text
    • https://fewelegur.files.wordpress.com/2020/11/43737742025.pdfIn PDF document text
    • https://s3.amazonaws.com/dinilederu/11161705372.pdfIn PDF document text
    • https://saxofenofam.files.wordpress.com/2020/11/trugreen_employee_w2.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/benefits_of_information_technology.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_off0000b6e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6E7 5132 bytes
SHA-256: 97006a3e457f273896677a8c3190db9edf04fd102b7e78a1dce2dd96eab005d9
font_01_sfnt_off0000c85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85F 10312 bytes
SHA-256: 54302d6f6d50dbbb8aaebe25149ca304abec4dd68a88a75e4601d5cbec63ab1c

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