Malicious PDF — malware analysis report

Static analysis result for SHA-256 9738bdf824c10221…

MALICIOUS

PDF

45.3 KB Created: 2020-10-16 10:30:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d2adef3761383bb2a7338023e87eaecc SHA-1: 6a2d7003204e7c0326c1fab2c7c6d068dd7f08eb SHA-256: 9738bdf824c10221d940aa6d690859138442d098e0dfb788437543bf1f51686c
134 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ggtraff.ru/123?keyword=activity-based+cost+management+an+executive%2527s+guide+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f88d03f31185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_5f890f12da453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5f8939fb5ae46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f872b29e5270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366354/normal_5f874e86cb62d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f870f5c8d23f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f892cc2c3c5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f89427c85675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5f873701655b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_5f86f92933dbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f88120d8b87c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366388/normal_5f871cbb66c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f86f8cc94453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f88c7fd34611.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/dd7f1d69-8af6-4b00-bbde-3feaa47292a1/vubokem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57e7f235-82f6-4803-9ad1-95d72b6e0fb4/66813622410.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eeab713a-94da-4dae-a546-38d75ce4a164/tulatigofaxelaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a75bc2-da83-4ca6-89a1-f1584fc1839c/97340631710.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4324e07a-1b8c-4a30-9822-9bbac7e604f1/84594757526.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_off00006faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAA 5772 bytes
SHA-256: 8e34943d2978d685fff09d3384b46decf0dc25b9e484b11f99b62c298fbb5b1b
font_01_sfnt_off0000835c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835C 10620 bytes
SHA-256: dee922d1102cf45096bb497a30a8b07b7b78a59ab8fa8291123eac27795edcbc

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