Malicious PDF — malware analysis report

Static analysis result for SHA-256 416e1504323f359b…

MALICIOUS

PDF

90.7 KB Created: 2021-07-23 18:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: cb457e40f7af6c9fb3539de536337474 SHA-1: 7c395621a09449ed0877850bd97c511824cc0ba6 SHA-256: 416e1504323f359bb35a8d09d8fc61e947f359d5707dafce4cf5191034d7d403
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and the nature of the links indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15db9b06e8---48132429463.pdf In PDF document text
    • http://gabinetortodontyczny.eu/userfiles/file/gojejez.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/99609404985.pdfIn PDF document text
    • https://rkdestate.com/userfiles/file/tulatuvotibomuremosebu.pdfIn PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/1111714395.pdfIn PDF document text
    • http://altinay-law.com/images/file/67834774339.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/tepepexubipabinedanor.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160af63f9149d4---kaniziludelulavatibodutan.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fa083a96304---49072840082.pdfIn PDF document text
    • http://apsons.eu/files/file/wiwuw.pdfIn PDF document text
    • https://actorconseil.com/files/file/bulepure.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/82047b685dbb90e6dfaefb53bb53c10f/bimepolag.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/71146404044.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/fs43rivic32re5e4a2kthck6nl/8434028234.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/17upd2e50g9vb3gb4djh1dv1h9/getubower.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/58bb8f8255c328939a85faa8f6dc0174/78322205821.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/61978394663.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5fba310a0e---wogebobikipevuwolej.pdfIn PDF document text
    • http://nebovsem.ru/app/webroot/files/files/mulipebagapetunozogasiz.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/80339730815.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/qvr4vtd55mjrlujf9eeii69o0c/vabaloruxebavuwozekimo.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/r8bltpd46pe4ar3bbh4b02l3q9/digen.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/16089d7ce525b3---lumukorum.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0b4c0fc4e---25029725474.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=download+brasfoot+2020+registrado+com+todas+as+ligasPDF link annotation
    • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/15223279667.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_off0000f638.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4F 11288 bytes
SHA-256: e5229e951b939d1a1c75699cc7d7a40962d06aed6008e948d4664e265407b42f
font_02_sfnt_off000128b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128B7 20560 bytes
SHA-256: 3d0b8def4675c5e590e55b9b86993d11dc1c825070b41a0f877987441529a9e0

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