Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fed7ff5022eb477…

MALICIOUS

PDF

82.6 KB Created: 2021-09-03 06:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 0ccda2a400ba87be69b803c84d530c59 SHA-1: 7051c32dff57a340f356bce071c1815afb025782 SHA-256: 0fed7ff5022eb4773b0bba7fdfb4f9c7d25baa2151f28b4bcee5930c5c3fdfa2
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://villa-margherita.biz/userfiles/files/zizowuviwukasorut.pdf In PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/68109327832.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/13646002402.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c82173262---48251992996.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/fazososuredileke.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/nabozewuvarigunikiliw.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16070e128ec49c---ninepafuforupi.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82f83c30ae---18792649061.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/patopurakupajepafebagovag.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/51665493546.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/memevot.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021081320290411.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/pofolidexota.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6103535b24---buzoxogawurekaj.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/kasazenamak.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/40254513021.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/rubelixoru.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/dekajesopamuwojerajat.pdfIn PDF document text
    • http://haphadoor.com/upload/files/59877736431.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160cab8a8704c2---petelasujujazev.pdfIn PDF document text
    • http://vipnovini.bg/root/f/uploads/files/juruwoguvu.pdfIn PDF document text
    • http://chayka-svg.ru/files/kuvukojowuwuwoneguje.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610d5db6d792c---sofixo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=organic+chemistry+with+biological+topics+5th+edition+pdf+freePDF 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_off0000d7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EA 18892 bytes
SHA-256: 7b17f53594707e54291e2454b4e29e9bce066b46aea9977ed085770ed3005668
font_01_sfnt_off00010903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001211a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211A 11564 bytes
SHA-256: a5d9355d39109d3427624d6c0bc79ad94d0e4d97e9afff8c085f72d18ca69701

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