Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a54d994828f25d…

MALICIOUS

PDF

93.8 KB Created: 2021-09-20 06:20:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fdec2dfe06cad13d393ec8802b335888 SHA-1: 7cc03bfb7b172f5c7d74366ad01ef5eec8f498c2 SHA-256: c0a54d994828f25dd419d5067046c2dffaec5524ebd08628554210be18fcc246
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or scam-related. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pixomot.ru/uplcv?utm_term=sufiyum+sujathayum+full+movie+gomovies PDF link annotation
    • http://familiehollander.nl/images/uploadedimages/file/86847024133.pdfIn PDF document text
    • http://pkpneu.cz/userfiles/file/35518667082.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/pusosowufagevorafeji.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/gre6a9lkli557em3a3f55jtke6/tajewitukik.pdfIn PDF document text
    • https://willes-gb.com/uploads/files/202109080552538920.pdfIn PDF document text
    • http://boldogelet.hu/media/mikivagirusomowop.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb9050e653---44752139037.pdfIn PDF document text
    • http://estatepie.com/files/userfiles/file/murivabibixovadiximaka.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a3af472a3---nifudotinafone.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/e9f6c71d51cc4bce2e8eb5b4f608ce67/boxugugometizafolok.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b9b062fe9f---50901957501.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/ajsjo78dr1cfug3krfs3b3509a/bagexulibepobunegug.pdfIn PDF document text
    • https://angkalaris.com/contents/files/xawomagezugoporunifuz.pdfIn PDF document text
    • https://proetcontra.hu/userfiles/file/zulepowodal.pdfIn PDF document text
    • https://polymadeniyaglar.com/fckeditor/userfiles/file/povufogegerigige.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/tusowamomodemisuduvalevar.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/bofuk.pdfIn PDF document text
    • https://eko-briketes.lv/userfiles/files/nelavunibun.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/68623006738.pdfIn PDF document text
    • http://eastendmediation.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wajogizovajusuxodegabi.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/161380bccd7c77---leronidagida.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_off00010b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B78 10944 bytes
SHA-256: ab11dd4b500331caa95d39963e73d8d51c77810393e233a88050890312bcbfc6
font_01_sfnt_off000124dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DC 17224 bytes
SHA-256: 3bde6ba15dada2d7a0f923526aed72f48d4bc1f7aafe944319c6481dc2acf290
font_02_sfnt_off00015166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15166 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1