Malicious PDF — malware analysis report

Static analysis result for SHA-256 79ec70e801082115…

MALICIOUS

PDF

87.1 KB Created: 2021-07-03 06:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f7d8e9bbda750f0cbcb14c9445a8c422 SHA-1: d8b0ecd05ac95af7d1be83e39f7b1921f0d3cb0a SHA-256: 79ec70e80108211565aad429e5d9455d8f6ab0cf986b8b49b3a18568f6304b0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links, many pointing to compromised CMS upload directories, suggesting it is designed to lead users to malicious content. The presence of multiple external URIs and link farms indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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 https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce0b634876---gikukijudotepufudivosatod.pdf In PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/c3d165ae2f7292924d8f89c7df19c54b/losutedod.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8320e3b4a4---4965267424.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f7bac0d9b---16658451837.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/potubojer.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df260386e2e---gilidirifuno.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ae588d9c2---gukona.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d47164e39---84507556491.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160d2f55e0922d---fobeteparoxodaxaruta.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/9912557700.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e254fe3842---fopemaxezev.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/hgoe6ijars3h81omt1n62k33q4/63504452445.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce56d1d32e---tilenar.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/35559274567.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/401de96a084eb8c62e4838a5061e7dda/wigiwedegejemogudoga.pdfIn PDF document text
    • http://www.doctor-carpet.com/wp-content/plugins/super-forms/uploads/php/files/nlr0mk4uu7fu012pqosfh27ob6/nowivobisazononedazomup.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-7-1/20210701022921958186.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/f3df5bb75c95e53ec7dcbb427df5f2f3/57865967812.pdfIn PDF document text
    • http://coffee33.ru/archive/file/38198654288.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/tek3e25bpqi68tmf8438pa0993/660994503.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/vigodavu.pdfIn PDF document text
    • http://andrewclaymonfishing.com/clients/a/a7/a7b0d980ee28df7184f998a87a00dbd5/File/65616560013.pdfIn PDF document text
    • http://imreelectric.sk/uploads/file/24702794510.pdfIn PDF document text
    • https://drinkpoint.com/uploads/files/sixanalalalusetavokeg.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/5b2d2a4249f0cca7f24c33dd38123b21/47269102762.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=computer+science+as+and+a+level+book+pdfPDF 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_off0000efe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE2 17108 bytes
SHA-256: 20a1597d8f136549b405a505f4f5d46f604a5ef9a30f5aa57da884df01b7a505
font_01_sfnt_off00011c5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013474.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13474 11208 bytes
SHA-256: 77b78f91f6c13bceb607b63aeecd332c257d9e63b0e5be2ce3a4d898b0678e8d