Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed8d27290c98cf3…

MALICIOUS

PDF

96.8 KB Created: 2021-07-04 04:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 94db189a09d1506a2b880f5fa6703d30 SHA-1: 8084a263da611bd24aeaf6282a6b0e42377dce3b SHA-256: 3ed8d27290c98cf3138376b1953507186a8565a9753691ca335b00bb4f70b781
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links to external URLs, many of which point to compromised WordPress upload storage or disposable hosting, suggesting a link farm designed to distribute malicious content. The primary malicious URL identified is http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/papowodogokebupuxitano.pdf, which is likely used to host a secondary payload or phishing page. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/bhj58p4bj0g5jr1cfdnvjnqnt0/95348124207.pdf In PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/0c314d158859b725ca8008229346aa2c/58977576187.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082021d3f976---zizonajekolazuditejuwet.pdfIn PDF document text
    • https://journeywithmypet.com/ckfinder/userfiles/files/82745123204.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b58983b2c33---95844749198.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/witabawaketanibotozaxud.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/qv99mmjpmurmu9tfah1rdmuf33/60029424241.pdfIn PDF document text
    • http://sam-global.info/files/file/jibod.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/javepolopesolenaxujo.pdfIn PDF document text
    • http://artistalexanderkanevskyroyalshakespeareglobetheatrelondon.com/clientMedia/file/papowodogokebupuxitano.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/a8qkdectf601uv121qapv1fekq/xerapaboga.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/2570114672.pdfIn PDF document text
    • https://badoza.net/userfiles/file/64895360298.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/d0a8a41d41dbfa739c24dfa6c5a5731d/gomosafajugogidi.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/7affd471675f779599a5566d6f21cd42/74377297809.pdfIn PDF document text
    • http://fsanaq.com/upload/file/210619094525111377i00h4r2gvsz2.pdfIn PDF document text
    • http://edgecs.net/documents/40059717586.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ca98d9fee---76363066443.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/pinesobetubetenapodoj.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/u0flkmnj9cr31olejf6c5cs225/60340290883.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b086e7344---sefano.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/5094n9rv057s2io97mi7k1cs10/filejepulixazir.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/46526166663.pdfIn PDF document text
    • http://mujuerp.com/uploads/ckeditor/files/20210526225728.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=laugh+instead+of+cry+quotePDF link annotation
    • 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_off000113d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113D9 18072 bytes
SHA-256: af46e9ed64c97641cbcd1ba2ee9d490f47c9bb11a47fa1279af0f41166563721
font_01_sfnt_off0001432c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1432C 11024 bytes
SHA-256: 24ab5dc0329143f12d2f8543d9da8a32c092bcc7e675f30c572475f24101b761
font_02_sfnt_off00015c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1