Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1801ec387f732e…

MALICIOUS

PDF

68.5 KB Created: 2021-01-05 13:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 547a3311f9c4b8f275787c850ce33b20 SHA-1: b4253dbdd90613266b47c4e25127b4d40755813d SHA-256: fd1801ec387f732e49be71544a33f51e4addbdf5ac5fad886583e21f19b037c2
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, indicating a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffnew.ru/wb?keyword=goa%20navy%20recruitment%202019 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5fb761050b1f2.pdfIn PDF document text
    • https://loloxanasi.weebly.com/uploads/1/3/4/7/134712840/d9381e00a1b69d4.pdfIn PDF document text
    • https://vabakapis.weebly.com/uploads/1/3/1/4/131453405/futibov.pdfIn PDF document text
    • https://liwujozixo.weebly.com/uploads/1/3/4/4/134497145/7466446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f8a16c16816d.pdfIn PDF document text
    • https://korenumotijele.weebly.com/uploads/1/3/4/6/134687452/c65f80ce5169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391013/normal_5f9ab2ae9b15e.pdfIn PDF document text
    • https://viwutexotopuj.weebly.com/uploads/1/3/4/5/134522905/sajixarowivosaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407795/normal_5fbb823e607a6.pdfIn PDF document text
    • https://xezinaruwi.weebly.com/uploads/1/3/4/4/134479948/kovanufaxegug.pdfIn PDF document text
    • https://cdn.sqhk.co/wevujawej/ghhjUhj/30072491093.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/ewhdig9/27388039351.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/a352ae64-9510-45a1-abae-ea87bb5a622e/nenawavetojofapaxeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4d2d40b-860c-458f-b007-3450b868b302/51552047987.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_off0000cdf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF5 5412 bytes
SHA-256: 25e393b5d4c655785ae5c8fad3338d7bb5472de33bbe9c92c0d4fb2e26a646a1
font_01_sfnt_off0000e05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05F 10940 bytes
SHA-256: be64fe5e62834163feb86d83e36435ac8692db218e57e684ce2c004d24a608f5

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