Malicious PDF — malware analysis report

Static analysis result for SHA-256 2441171db806d35f…

MALICIOUS

PDF

92.3 KB Created: 2021-05-28 06:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7724590e4aca392486dbbc2f6c1d8b1f SHA-1: 4a0e3e115cc18c307985e0cd2e544c8199d216e3 SHA-256: 2441171db806d35f2d2959c73553b440e2757c4d7a38bc1418f500f1e1e87bfd
156 Risk Score

Malware Insights

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

This PDF file, identified as malicious by ClamAV and an ML classifier, contains a large number of external links, many of which are likely part of a link farm. The primary malicious URL points to a site that appears to be a lure, masquerading as instructions for 'Golf buddy aim w10'. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect users to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=golf+buddy+aim+w10+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4503524/normal_5ff497f319ee9.pdfIn PDF document text
    • https://puvojokuxika.weebly.com/uploads/1/3/5/9/135985507/662f9d0acf5692.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427273/normal_5feb2c7c36ec9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495269/normal_5ff4f8a13d3e2.pdfIn PDF document text
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/651fbe338b17.pdfIn PDF document text
    • https://geroguvipem.weebly.com/uploads/1/3/4/4/134465684/soduberogeje_nesatolob_jesaxexeduzad_xaxenejixopiwo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491933/normal_5ff5e5173f962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_605af6f359173.pdfIn PDF document text
    • https://zanewodibamejat.weebly.com/uploads/1/3/0/9/130969445/ranasijexuzixow-vofatixifelo-mizizadur.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378381/normal_606599da75d17.pdfIn PDF document text
    • https://sawisede.weebly.com/uploads/1/3/2/6/132681865/0e07a.pdfIn PDF document text
    • https://pizalekelakeg.weebly.com/uploads/1/3/4/3/134376537/rafonafezozenu-boxej.pdfIn PDF document text
    • https://dugizixenopiloj.weebly.com/uploads/1/3/4/4/134457585/4194009.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369900/normal_5fc59b923b119.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450630/normal_602205ff3083a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454419/normal_6017db832a611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425533/normal_606b149b161a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416923/normal_5fd33ab74645c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/563ac18a-7c95-4f07-a2a0-508df18c315b/pride_and_prejudice_2005_movie_tour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a217753-2b06-456a-94fe-2a1ff433e0f7/john_deere_71_planter_depth_bands.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8174fe36-9828-4ae5-90d7-88b550905060/purple_cowboy_wine_lcbo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce20345-36d5-40c2-a24e-e7d042cce488/boduponejatot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/527be6af-2023-48f9-9a9b-27882f40551a/38498168757.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89C 15888 bytes
SHA-256: 66156022f57886cce15e4ab01a578c265746370f2f66cd154b1521593fa2829a
font_01_sfnt_off00011bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC4 5488 bytes
SHA-256: bc9c5e942d492cec547447fd61e909fafd2d010b2b80dfe7d383325879c0a93f
font_02_sfnt_off00012e6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6A 10864 bytes
SHA-256: d036a12d141ea839a20e83c9d6128492eda94d0e1e71fbb45410e2a79d7ef2a1
font_03_sfnt_off00015370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15370 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3