Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f00b2c328bbb45a…

MALICIOUS

PDF

81.7 KB Created: 2021-09-21 07:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5fc9e1df94750bd79b8632f382db0034 SHA-1: 0a95c080f20852f73c625277a764c3a099c7c696 SHA-256: 2f00b2c328bbb45a270bc062fc2146df08a3afa0b2838980116d350616e7154f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 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://inwebjor.ru/uplcv?utm_term=the+wheel+of+time+eye+of+the+world+pdf PDF link annotation
    • http://sanzmendia.com/userfiles/files/susuxava.pdfIn PDF document text
    • http://connectcontrol.net/files/userfiles/files/lepojuzevudutoxo.pdfIn PDF document text
    • http://rehahomecare.com/upload/editor/files/dibewapikejen.pdfIn PDF document text
    • https://buyafranchise.org/files/files/nilavidimudutori.pdfIn PDF document text
    • https://zohopinler.com/calisma2/files/uploads/fuzunopepawu.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1613d158a5e168---jigemigunoga.pdfIn PDF document text
    • https://vmgeducationtrust.org/home/vmgedu/public_html/public/userfiles/file/15421883135.pdfIn PDF document text
    • http://gallery4walls.com/upload/editer/file/zutetedajekil.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/rilovawijix.pdfIn PDF document text
    • https://network-italia.com/file/64565860639.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/8828334157.pdfIn PDF document text
    • http://myarrahnu.com/mo_images/files/zolopuwajov.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/nojokafisoxotepasog.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161413bc57383a---jevudavajirukibisibex.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/wobakivuzapisularilufo.pdfIn PDF document text
    • https://tiguan-wiki.ru/file/mukenuxijexufevoke.pdfIn PDF document text
    • http://haliburtonhighlandsheritage.ca/userfiles/file/gadoraw.pdfIn PDF document text
    • http://datcat.vn/2018/file/69612872199.pdfIn PDF document text
    • https://gobelsprofil.com/upload/files/55499688375.pdfIn PDF document text
    • https://mclandpin.com/calisma2/files/uploads/14727740547.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/92326620324.pdfIn PDF document text
    • https://vilnius.cvzona.lt/resources/img/files/vuwek.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/53890543398.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/46993879712.pdfIn PDF document text
    • https://drgcode.managenet.ro/images/file/mulukupinizufuxetibemapa.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA8 10492 bytes
SHA-256: 3c320ec75f9b679c05b5207eca2520fa6ef1d1a0dbf094193543e0e76e31a312
font_01_sfnt_off0000f385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF385 17424 bytes
SHA-256: 853055ec7432ff494d7c7eee09843fac08275e940bd8f81e7494284b303590ac
font_02_sfnt_off000120da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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