Malicious PDF — malware analysis report

Static analysis result for SHA-256 860047d043368bdf…

MALICIOUS

PDF

112.3 KB Created: 2021-09-03 02:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4b2b2cea23cdf36d56ec5b4bc88fbe9f SHA-1: ab3507e2ff768caaca3a61a62bfbdd6074977516 SHA-256: 860047d043368bdf4faf46de943514d5cbd13513da422c3d8d73e4cd2026582e
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or redirection scheme. The presence of external URIs and the overall structure point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/2870ede6e3ef65ec1f8dfea3f17aaaa1/30629773336.pdf In PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607541e5936cc---17711497947.pdfIn PDF document text
    • https://jgranit.pl/userfiles/file/zapebojalebexaferamo.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/zoliwaxedujenibipubowite.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/risaxawulabadoga.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/butaforotidivofabi.pdfIn PDF document text
    • http://dissanna.com/temp/fckeditor/file/xeriwas.pdfIn PDF document text
    • http://yuha.be/_files/file/40185507719.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/49ec42a7e30961ec5d1c49a3775d47c0/zozelolegobapibiw.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cff814718---vagigizirejajotipa.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082a81212d37---49274991355.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/romejufakuzaginepakoreta.pdfIn PDF document text
    • https://www.harasportcenter.com/wp-content/plugins/super-forms/uploads/php/files/ugpbdqo75e3e8h89j4dp9vimdv/84364659630.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/zipofokeritepub.pdfIn PDF document text
    • http://thietbimaugiao.vn/Images_upload/files/12099280837.pdfIn PDF document text
    • https://0900107678.com/upload/file/doxixinaworezivira.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e378cbb36a---16216042159.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/096c9cde674839c5144dc733a4a59cd2/wetuwenezimogobobomusu.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/id45sd1j332d0e35ku2ldjjj01/31743626245.pdfIn PDF document text
    • https://congchungnguyenlieu.com/uploads/files/18031690844.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/zizito.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/nrlca1qcmehp34lqgoosek1lk1/zexawifemoxatiwuk.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/52924793142.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ba221276209977fb17e9a01246207e87/31818471774.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ferris+is3100z+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_off000150a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150A3 10536 bytes
SHA-256: 71d63432b53fd237ca989a7f30dbdfef14c98a230ca24d780ed510d5ca574029
font_01_sfnt_off000168ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x168AC 19216 bytes
SHA-256: 482368d6a6595a375d2b83e7c815d9f33d2dfdf9843166892a99d593347edab2
font_02_sfnt_off00019b15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19B15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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