Malicious PDF — malware analysis report

Static analysis result for SHA-256 15a30d9005d2b3ac…

MALICIOUS

PDF

70.4 KB Created: 2020-11-25 20:09:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 225449b71a642223dad833d5750f0a4f SHA-1: b48ba471ecbf719aed8a049c40796bb815f68214 SHA-256: 15a30d9005d2b3acc054aa74960176f96e50def2ed417d0a46fe2868925542ba
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing and SEO link farms. The 'ML_NYX_PDF_MALICIOUS' heuristic and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'Writ of attachment florida', suggesting a lure to trick users into visiting malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffset.ru/strik?utm_term=writ+of+attachment+florida PDF link annotation
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/kezupukono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_5f8ad236a1afe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_5fab132e81fb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490539/normal_5fa978ebca28b.pdfIn PDF document text
    • https://fadibukomu.weebly.com/uploads/1/3/4/3/134310842/fe4649750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5f9dfbac0f197.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/5ab7326d-bbfa-422a-b325-62996333b242/pavamowuziduse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c20fbf8-fba5-4282-8678-0481daf85132/wuxotida.pdfIn PDF document text
    • https://s3.amazonaws.com/radubozufiwo/deadpool_comics.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/fozofetopiwixi.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/1_pulgada_a_mm_exacto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1bf24f-b7a8-4c9b-b29b-eb8a7b6eea17/wuraninutuzuxugi.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/tidekekizuvi.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_off0000d72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72F 5096 bytes
SHA-256: 95759177e1b7632da81d235961c48a1129ac8ef9b9e5f656707cc4f307faf529
font_01_sfnt_off0000e867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE867 10832 bytes
SHA-256: 8458cef8e806671dd2b1d37fe3b19a7f633c4a9e7487d7bc3cd7ef314d935321

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