Malicious PDF — malware analysis report

Static analysis result for SHA-256 942c97e60803a9c8…

MALICIOUS

PDF

85.8 KB Created: 2021-08-14 01:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b63294f825f322890542fab4e12561d6 SHA-1: f69f396fdfa2026f157c9fa62711eb0dff64aa17 SHA-256: 942c97e60803a9c8cf79d80668a787c99b86d828804a7661a048c5f9d590ca1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS platforms or appear to be disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for SEO spam or phishing. No scripts were extracted, and the document body was unreadable binary data.

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
  • 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://canvangdientu.com/images/file/zitujevatopupetese.pdf In PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/be4e32bc98e1ab7927f3826cd5d68a47/56232694213.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/zitukiv.pdfIn PDF document text
    • http://isgsrl.it/images/file/wijisenikip.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/fae7a7cbe0f0f77d6166f9fe5fdfafcf/xugoxixiruxiwukada.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5552c5d8a---24608977378.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/24845650337.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/79ba615c4a6f5bcca6858d8dbfb0ea55/wumolavuxusomipuxe.pdfIn PDF document text
    • https://bocion.com/ckfinder/userfiles/files/wufasoxuvupirunoj.pdfIn PDF document text
    • http://terminsk.by/pics/files/4120771268.pdfIn PDF document text
    • https://ht-cooling-j3t.com/contents//files/tirepozipabebakokesiduv.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/bd222174c539d5556336a263f72d3c94/79277833217.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/54442686781.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/cf692045a953f689cc8198734accf8d3/24099819486.pdfIn PDF document text
    • http://davcpundri.com/css/file/67953291181.pdfIn PDF document text
    • https://wittnebel.dk/file/33100174853.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/8sehfvhsq5al6hdch66l611vk6/wabofatabasunozenobanajum.pdfIn PDF document text
    • http://614move.com/clients/4890/File/82635845410.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e66a8285052---vubif.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbac986a3a---11884192998.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/e2f0ef6010b0edb5b63395951dcb4c5b/mipiliwexavifafusatokuf.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/fabec764585470a1be474cb8a0869010/79737075017.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/80641045979.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/xapamaxawokene.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+do+i+write+an+environmental+impact+assessment+reportPDF 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_off0000ee27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE27 16156 bytes
SHA-256: 2240535a5cef174c3ab9e5f0ef8533e82992154836ccf947b35c022f83913f57
font_01_sfnt_off000117b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B0 10820 bytes
SHA-256: 72f0fe07f2824fe659b3055f5db1089b2eb5a79e34cb216fd4c52bd04f526b3e
font_02_sfnt_off000130a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1