Malicious PDF — malware analysis report

Static analysis result for SHA-256 2068fa2ff6bdb97b…

MALICIOUS

PDF

84.9 KB Created: 2021-09-03 16:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e7842b5dc93b0376521e13ab892df4c0 SHA-1: 75fdf3aa73e70de1ed4aeff7ecd971e3ca8a5a07 SHA-256: 2068fa2ff6bdb97b9abc13c729c4c9376299b6b954a74ada28c0728414c8fe5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, indicating a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://vivaibonomo.it/userfiles/files/xuvalufozejesawijuwafixo.pdf In PDF document text
    • https://avela.md/userfiles/file/89887870666.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/dusakadi.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f20f6420fb---pisiwa.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/55338912851.pdfIn PDF document text
    • https://tamphuctriland.vn/upload/files/suwozulalojupiwi.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/zibujexujigepiladose.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb637239aa---kuseginuzotixus.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/darifowiwetovorego.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210710115458580.pdfIn PDF document text
    • https://beauty-full.ru/uploads/files/pobokura.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/b0d3b13ffe0f559653aad8d5ba156ab6/25819750216.pdfIn PDF document text
    • https://leuphuotcamap.com/uploads/image/files/gekuk.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16093faa2ea61f---17551424070.pdfIn PDF document text
    • https://yellowstonewildlife.com/gisadinukizo.pdfIn PDF document text
    • http://palyavalaszto.hu/teszt/upload/file/zapesilidilakik.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/20233725931.pdfIn PDF document text
    • http://gorod-r.com/userfiles/file/50561961602.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/187c462b589c3a82877b32e41ada3c5b/jubulopavi.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b65d46651ad---xuluzijasudodaposakipoku.pdfIn PDF document text
    • http://clear-es.net/yamituki-n/uploads/files/9461347423.pdfIn PDF document text
    • https://sikanderajam.com/Robinson/ckfinder/userfiles/files/57367900268.pdfIn PDF document text
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/wozodisudumukezaxasutaz.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/bajofanadalijopusugizoz.pdfIn PDF document text
    • http://guitarenko.fr/img/files/lezabolodix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=combining+pdfs+in+preview+macPDF 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_off0000e537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE537 18208 bytes
SHA-256: 71eb408cac7fbfbe95cdada5655198504db19dcccb2452924b790edefcdd731f
font_01_sfnt_off000113ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113FF 11140 bytes
SHA-256: 64b2c9d046030aeefab0c81fe09f83cc30d815862747b09a3381c69874950056
font_02_sfnt_off00012dab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1