Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3e4e1be5b556b4…

MALICIOUS

PDF

49.7 KB Created: 2020-11-05 16:03:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 76750ea0c8b3adc16963b391dec78c31 SHA-1: b75cac7506c6a36c73474d450e1b87a22db1af22 SHA-256: ab3e4e1be5b556b453653702724061f391c22752a6eed020ec9b176dac13a321
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 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/strik?keyword=hero+s+journey+in+the+odyssey In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366676/normal_5f97847da1c87.pdfIn PDF document text
    • https://suguvojonejufo.weebly.com/uploads/1/3/4/5/134585364/riwefega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_5f9917020c868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369659/normal_5f9bf5ac3fc55.pdfIn PDF document text
    • https://zewogamiwivu.weebly.com/uploads/1/3/4/3/134313422/xiwotutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5f88af918ecc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f9dfa5d583f5.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/vipinib/jivekajuvofuku.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/ccna_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/fitotabexawaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df18b772-8acf-4f13-bcbf-ea02fb863c5f/zerg_build_order_vs_protoss.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/kakutemosewevodofir.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/zudurefu.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/nordictrack_e5_si_elliptical_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/taxodi.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_off00008576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8576 4812 bytes
SHA-256: 9f3cd719d4aa0912716b7ac91e8118626bf93581b2b1a4106d3805f2bb30ad43
font_01_sfnt_off000095d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95D3 10632 bytes
SHA-256: 6e1d514012c9004c377e727e7ae3413bef3d361ebe7905701aae5f4ee76036b6

Open this report in the interactive analyzer, or submit your own file for analysis.