Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b5754f06f93d4b0…

MALICIOUS

PDF

62.8 KB Created: 2020-11-21 21:58:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c06aa8c120b967991fcf239a0c559d50 SHA-1: f5dca343ee1479ebdd7a0047200ba34f9ac48d48 SHA-256: 2b5754f06f93d4b095d00b16f6e9ae389a4fef2394aea22a21be408763356cf2
156 Risk Score

Malware Insights

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

The file is a PDF that contains numerous external links, many of which point to domains associated with SEO spam or phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/123?utm_term=math+kangaroo+questions+pdf+grade+2 PDF link annotation
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/038885c85ecf8f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f870acc69bc7.pdfIn PDF document text
    • https://gesefamuredoxuk.weebly.com/uploads/1/3/4/6/134631359/6665467.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384144/normal_5fa516a11e529.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/7c2e58d4-c870-4979-ba23-62bbfa806895/30974611259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48741fc3-1572-492c-82c0-6b18cfe8d49a/fenimorewamile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c1f1fc5-c87d-45f9-8694-b9aa981abde8/vuwusomekexenipetejubegor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f78d19f9-f50c-4c69-9d9a-538cdf3ad1e3/miwatap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94f47f16-ea41-4336-9afd-a2fb314e0c5c/buford_t._justice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/279b6fe1-f346-4270-b8e5-f9abc2980838/rottgen_pieta_khan_academy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81ecdfdc-d327-487c-b0db-11744c382193/13815429108.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_off0000b435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB435 5596 bytes
SHA-256: 67b72f91b68a2a33be78e426857055aafe48e218dbea4147b5af2e85393294f1
font_01_sfnt_off0000c742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC742 10956 bytes
SHA-256: 13bb3d7d8b40573daf323003806862a70b8a161159c8d7577607bd06b4c20370

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