Malicious PDF — malware analysis report

Static analysis result for SHA-256 968f97b2aa111245…

MALICIOUS

PDF

71.1 KB Created: 2020-11-19 01:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: caf8340999cc2bec801411e8ac494f05 SHA-1: 95727bd97cdda71ca4ccd37bc27352bfa2c947a0 SHA-256: 968f97b2aa11124544147cfba826d71e8ad64b671bb63e3f4b1c44d0c767d26f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffking.ru/strik?utm_term=ki+kare+da%25C4%259F%25C4%25B1l%25C4%25B1m%25C4%25B1 PDF link annotation
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/soxakupowaviguw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388274/normal_5f9391a1814fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476127/normal_5fadf92c7fdc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369772/normal_5f98434e5098d.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/510c3bca-aeca-4ebf-a7d8-786381c67cd0/rajixojozixopidifin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3524aa5d-84a5-4e8c-97cb-06fc1d251b78/44645302198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55e2a5d1-34e5-4361-a222-d222173843d8/82695546143.pdfIn PDF document text
    • https://s3.amazonaws.com/lebejos/72110288633.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/edward_scissorhands_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc7f2dd9-5b6d-4d69-b0b5-e738548d405c/83986269655.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC816 5088 bytes
SHA-256: 78fef4f92b73fa6ba96af09cb9bfdbe2e5cd8e8e64f8d897cd5c214b936e75b7
font_01_sfnt_off0000d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 3720 bytes
SHA-256: 40ef96da86b6123d577d475be460de15c41b9ca7393a8e650be4e9942aa3c64b
font_02_sfnt_off0000e4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B2 13036 bytes
SHA-256: 6a9f908bffa743826569f391992a218149b8aff93f5b3fcc9103017e62ced286

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