Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d6ec7ed0ddd748…

MALICIOUS

PDF

95.7 KB Created: 2021-09-02 18:13:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 43bd7c83264f68f952bb7987db145e9a SHA-1: 0dbb58a88e9884677d9c1044b1abc7aaccf9f407 SHA-256: d6d6ec7ed0ddd748c2f054a97c5c9cedb15219cfceb134dbbed0226215f28cc6
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with multiple heuristics indicating it functions as a link farm. Several URLs point to compromised WordPress sites, suggesting an attempt to host malicious content or phishing pages. The document body is unreadable, but the presence of numerous external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/ac54d880aea301ff4c23e487f52e5ac5/xasatejobeja.pdf In PDF document text
    • http://www.thaiboat.net/image/upload/File/25023361461.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/73492514361.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/6b8ff18a7bbb4d3eb142777587a72ed8/8853542103.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/65601685840.pdfIn PDF document text
    • https://elegune.net/files/galeria/files/wiguganagunikujipe.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f96a11251e---xikevadodagulan.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac49ff37e13---60534303324.pdfIn PDF document text
    • http://fillaracingacademy.cz/ckfinder/userfiles/files/46418335373.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1bb07ed4c---gutewalivopup.pdfIn PDF document text
    • http://xsteelstock.com/d/files/43421789984.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/fagaxevejojibajizuterapo.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/jazuveriditefozos.pdfIn PDF document text
    • https://cplastik.com/data/cms/file/55599888909.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/76346993934.pdfIn PDF document text
    • https://olgunbey.com/upload/ckfinder/files/kekopimu.pdfIn PDF document text
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1b8efbfb2323826b82b8e50fa3f1f542/gujugirizupawarobu.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/74350998020.pdfIn PDF document text
    • http://aeusjtu.pretty-match.com/upload/files/94228824571.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/godadamut.pdfIn PDF document text
    • http://kommunikator.nu/demo/userfiles/file///22265358950.pdfIn PDF document text
    • https://a-pointpro.com/cms/ckfinder/userfiles/files/mufasiroliv.pdfIn PDF document text
    • https://kuzeyilac.com/resimler/files/34058193235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=classification+clustering+and+data+mining+applications+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_off00010c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C21 11092 bytes
SHA-256: e71b3be4796abb4a139af4784fe4168d116ab40e16078c26e232cd930aa72dd8
font_01_sfnt_off000125c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C7 19516 bytes
SHA-256: 74af08467f9a892afd2ba7ad120ee3b1057cb087d9c7da7decc5b2500c10752a
font_02_sfnt_off000158bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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