Malicious PDF — malware analysis report

Static analysis result for SHA-256 038c3dbafa4f17f6…

MALICIOUS

PDF

102.7 KB Created: 2021-06-26 16:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 275422f0f0f78dd1aaebe49024ea57f9 SHA-1: ccc77a64f977e34563f07a7098ee1586cd3f3011 SHA-256: 038c3dbafa4f17f603d3aeb9781df77869fa60d761605a68edf33091d2020dbb
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised WordPress sites. The presence of these links suggests an attempt to lure users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9790

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://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/46d6c39f8afa9ee20d2abd3d3793eb52/96266647786.pdf In PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098afb225b99---47281341448.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607328f9f3e8b---jopoxotemob.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/d140dbd30cb1e28dd0b1d84ee5651769/zegirutetujaxuxowusep.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/63382308886.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7c039612b---gijavogebojenoroti.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/tewigad.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dda513100a---mimimowe.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608646ad9f6ba---ramoxuxam.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/k8fmeditr84cq3cdar9kodakna/38625914849.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/dkqea1iu58bsufgg9ibv2i5m7p/getupiwigulatoxipelopibup.pdfIn PDF document text
    • https://x-software.cz/data/file/vakuxazorotepafetodifatu.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-9/20210609122707370329.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/84513093974.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/17605335925.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2b9fa740f---69175379693.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/56a5a588ee102978c30300a22f1c819e/51098693587.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b85d6b2474---65217318608.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed680c9082---gasilebesalizonapunalosu.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/wikiv.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609cc00e084ae---52326096434.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/67295517104.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/5iqqsv42u7ai3loes7kjagd775/99576012100.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/40747617520.pdfIn PDF document text
    • https://davidfauquemberg.com/home/fauquemb/david/bbdg_site/userfiles/file/59471542552.pdfIn PDF document text
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16080dfe210fcb---9936245487.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=influence+in+tagalogPDF 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_off00012e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E28 18584 bytes
SHA-256: bdaea7ab28df53bfb8337a9faf0028fe16944811cd98fb52108e7e28bd81bdcd
font_01_sfnt_off00015e25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E25 10296 bytes
SHA-256: be0844f347d66f0257266806714780d45bb15a382f89c9f5cd2aa1e8943620c0
font_02_sfnt_off00017575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17575 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1