Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd83d966f0e38e5…

MALICIOUS

PDF

84.6 KB Created: 2021-09-05 00:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9ecd8777550d1b45bb2208cbc6e2e722 SHA-1: 9971e5917f043dddbfaf336290431f12793ce203 SHA-256: 7dd83d966f0e38e5fb03855fccbe14c048e838b44061e801ae4fe3e673eb28ee
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS upload directories. This structure is indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/e37c046e2c679b192a9b5f65f3f3b445/73840604152.pdf In PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/124a6f9a0575e140438349ef489b89f2/vepor.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/44291053209.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c22b5296a12---bepuresivopuwebor.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/gijumiwobaril.pdfIn PDF document text
    • http://fusen-es.info/yamituki-n/uploads/files/24493204552.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/9951c97eeae35dbe0fd7df4f7e54a13a/rurodapusuburit.pdfIn PDF document text
    • http://mastersequipments.com/ckfinder/userfiles/files/wopukesumaf.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/wusubebisasekuz.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/zetuf.pdfIn PDF document text
    • http://uss100.com/clients/5/56/562308f4da1da23328cfd9e5c9f3e68f/File/23818319165.pdfIn PDF document text
    • http://darstin.com/userfiles/files/17116510409.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608291a052de2---zajorubegaxafa.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/c7d3e652000d67aadcfbe206fe78628a/76195115137.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210704061522211.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/rjosg3e4m259pl6737q2jsm4j3/benutunorajukowanusuf.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/nonedazanonuxom.pdfIn PDF document text
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/rivopova.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccd539cba6---tutasajekijovavon.pdfIn PDF document text
    • https://biocoils.com/img/file/76433614118.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/8d87271795adfd7d78239e5456027813/wusowemalepo.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/26256672251.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=lorenzetti+duo+shower+turbo+manualPDF 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_off0000de06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE06 10856 bytes
SHA-256: 4f6c4a0aa2d30c9d867ad27f31ba0f3973e4dac439cb582aba8b5b0b565aff7b
font_01_sfnt_off0000f6ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6ED 20500 bytes
SHA-256: 530b9da909ce18b8d5fea411b832b0329b3912f186559c31a013a3a3076e8fba
font_02_sfnt_off00012c76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.