Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6ba4c51fd3d2e9f…

MALICIOUS

PDF

85.5 KB Created: 2021-03-24 10:58:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 823c4c542f6e8005800619b83b33f6c3 SHA-1: 63bea323d3ef417bf28b34ffb8c7b2d957f53ff9 SHA-256: b6ba4c51fd3d2e9f3f2a3eba30aaa85a9309d9f689081022f8aeeee4c1e38cf4
134 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm designed to trick users into downloading malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/wix?keyword=quidditch+through+the+ages+pdf+google+drive PDF link annotation
    • http://flebolog24.com/sedozemapekumaralapupuer9.pdfIn PDF document text
    • https://waxosutuj.weebly.com/uploads/1/3/1/4/131437699/785c40e12.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/gigagfz/93202545736.pdfIn PDF document text
    • https://wiwupaluw.weebly.com/uploads/1/3/1/6/131606778/zisisejad.pdfIn PDF document text
    • https://cdn.sqhk.co/xagegegozi/iiegiaS/72068867654.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476282/normal_5fe4af9296456.pdfIn PDF document text
    • http://teasmall.space/pegusia4vv5.pdfIn PDF document text
    • http://vorgazme.com/sokaxexumatezejirgfk67.pdfIn PDF document text
    • https://cdn.sqhk.co/jalosemuv/jjgfjeA/xawijexixidisekug.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/kojus.pdfIn PDF document text
    • https://bigimenuxorotel.weebly.com/uploads/1/3/4/6/134655509/5503395.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/Thd8tgi/bedoxidexefowowijojop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406223/normal_5ff42c0ff2eaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_5fdb3872717e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409998/normal_603df34b5285e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474988/normal_60567258c4e76.pdfIn PDF document text
    • http://sfhgfje5df.xyz/percy_jackson_books_in_orderdwjhb.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/jVidmib/zazobotiwu.pdfIn PDF document text
    • https://topukutenikoxi.weebly.com/uploads/1/3/4/6/134668920/1809552.pdfIn PDF document text
    • https://cdn.sqhk.co/wujejelot/xhfgdhe/7344342783.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rawodofomer.epizy.com/invoice_number_generator_google_sheets.pdfIn PDF document text
    • http://jinonepi.epizy.com/reinforced_concrete_design_handbook_as3600.pdfIn PDF document text
    • http://daguvagobilat.rf.gd/what_is_the_salary_of_safety_officer_in_kuwait.pdfIn PDF document text
    • http://mafonoxerinomif.epizy.com/69938913648.pdfIn PDF document text
    • http://safefimij.epizy.com/nikalekofutolibajoxibe.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_off0001114e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1114E 5536 bytes
SHA-256: 955aa049d59ec865d9d0ca94fc3c97dd26887158a9fa399efa49be3833ed277c
font_01_sfnt_off00012427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12427 10440 bytes
SHA-256: 2ccff3fba537c7bb2604c2faa55d92a9fd1c9c741fc23ad18416a539ffec9615