Malicious PDF — malware analysis report

Static analysis result for SHA-256 634d4c8301215a18…

MALICIOUS

PDF

47.4 KB Created: 2020-11-04 21:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: aa996e390cc61f5a16b87d28fa26afe2 SHA-1: d9871938187d79cddd384af115941b3b29bb4b3e SHA-256: 634d4c8301215a1868c50ce724fdbb24eb5687d00cdb62c510265eb45bfd088c
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=banana+bread+unblocked+77 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369664/normal_5f946f903c0a0.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/zetare/boy_scouts_medical_form.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/positivist_approach_to_research.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/timokulawedumef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1804f055-0dc4-4486-8c95-ec0079f60d8e/poratokosominomavolem.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/17905410539.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/xigezewutuseralevit.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/relative_clauses_grammar_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8632c681-2019-4924-9e1d-dd7d24fd1c47/fatetewolebivutelodepone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e8c286-0997-463f-a0d0-c5eb92dcc5e7/gekojalen.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/coffee_direct_sales_business.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/pogefibale.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/bamejagaxoxodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e63893a-4bee-4ee5-a1ca-bf88e62838f8/updated_2020_ap_exam_schedule.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_off00007cb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB2 5088 bytes
SHA-256: ecf32653f0fa4843a00651417604294bce429abc97cf8fc7ce97ef67b4c05113
font_01_sfnt_off00008e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E10 10060 bytes
SHA-256: 5aabfa385c44193a986fe37c69d8bca4cde31ca41998385ca30fb63194c0ab45