Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0024d82d4201ed7…

MALICIOUS

PDF

71.4 KB Created: 2021-09-19 13:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: a492b50f85cb3245184ed434b8bce2b1 SHA-1: 8b0f537d0584716cd5e13e0d32edccc9d241b6ab SHA-256: d0024d82d4201ed78f7af68f7bd12048e7ad9ee1806cc8011787782595069e3d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to link farms on disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://garglob.ru/uplcv?utm_term=pdf+gd%26t+symbols PDF link annotation
    • https://martensmgt.com/business_school/uploads/file/besugeloxowujivekodepi.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/jukapefenafozojafugaw.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/penujilefoladejuruta.pdfIn PDF document text
    • http://cuacuonnhaxuongbinhduong.com/upload/files/84085066920.pdfIn PDF document text
    • https://cupanghitam.com/contents/files/toditaxizu.pdfIn PDF document text
    • http://redondoclassicburger.com/uploads/files/76118947895.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/mexakasanuxazibuxa.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/161394584c9126---wasexazupupekepimaburopej.pdfIn PDF document text
    • https://planningpvedh.nl/ckfinder/userfiles/files/goxinir.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/rikegabuzeruxafifire.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/fac3f33db10c7086d26cc6a323d04629/gumolija.pdfIn PDF document text
    • https://maintogelonline2.com/contents/files/pijij.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/5549542075.pdfIn PDF document text
    • https://sakesushimn.com/userfiles/files/52677610366.pdfIn PDF document text
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/562ed30000e6e206c83a15f5158f2900/63771144242.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/78330568374.pdfIn PDF document text
    • https://renetravel.ro/images/files/rebukupexaraw.pdfIn PDF document text
    • http://narnivet.com/userfiles/files/mopasifevajewor.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/3631d2bb012b3a4d3e298321faf44e88/letaliwevonewo.pdfIn PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/22468986581.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/844597308.pdfIn PDF document text
    • http://taociren.com/upload/file/210910181457695376p02yv1d7i9rv.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/tojitaxolokumagapusi.pdfIn PDF document text
    • 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_off0000bb61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB61 9508 bytes
SHA-256: 9e68cc326e641f52ed07c0764789fd24de6a98885ff827888d634486b7722565
font_01_sfnt_off0000cf9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9B 16052 bytes
SHA-256: 3027563e01d9621881c1ef8447a02ae8f5fc6bbbf35aefddeb45f843df601230
font_02_sfnt_off0000f8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1