Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdfb1de917c9dac6…

MALICIOUS

PDF

139.0 KB Created: 2021-06-30 03:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 08bdc5f0f585365bc6a0bc67e654b5c0 SHA-1: 6d6a826b1364a98fc98f8f673f85eb3a1186ec02 SHA-256: bdfb1de917c9dac67b09b3125c485324b779ca6379387dc4d8d7ec80eef9de13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to lure users to malicious content. The embedded URLs, such as http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc293c06ad---wabudagizikonisiwur.pdf, are hosted on disposable domains and likely serve as phishing lures or malware distribution points.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/18ddf1996ac242469df8c18c8087b1b8/vowaliveboporobed.pdf In PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bddbf96f6ea---menibetududozoposomadi.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///59101023863.pdfIn PDF document text
    • http://dongphuctqueen.com/upload/files/9526663104.pdfIn PDF document text
    • http://consol.hu/images/uploadedimages/file/wigufarisosebuw.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdeeeab6d1---fumuzogojukafamebuvegem.pdfIn PDF document text
    • http://decamiones.com/userfiles/file/tawogesu.pdfIn PDF document text
    • http://goref.ru/files/file/50165917890.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/7b91cbaa1744b4fa7ee4bc287226e6c6/dulovituzuxorekatesafiju.pdfIn PDF document text
    • http://morgancountyoh.com/userimages/xamokobexikopopo.pdfIn PDF document text
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/f3f792fd2121a226d167300738aa6ae7/72252178631.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/794905a31103b49f998e09498ad5f9d4/17993412472.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b704ffb4029---xokawojafuk.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc293c06ad---wabudagizikonisiwur.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc916d1776---39915263782.pdfIn PDF document text
    • https://ancoraeducacion.com/images/7571068121.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/omf3feffkvr1dgf9gfu4r025e2/kuboladu.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721e90bc8f0---laberatud.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160968de7f154d---wuvaz.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/hnur3nkrg54g9lnhnscmqsrer5/4660385765.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/0dio83cpuq6adpbnimtjapksr6/57775088156.pdfIn PDF document text
    • http://thehonourride.com/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/kepigufu.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/dorat.pdfIn PDF document text
    • https://room12shio4.com/contents//files/42580194697.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=dilaudid+and+tramadolPDF 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_off0001bd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD0D 19772 bytes
SHA-256: 7e3978d9ec176f6e3eb8bc679d93a2b41a177d815642a16cd80aa615f4423681
font_01_sfnt_off0001efcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EFCB 10208 bytes
SHA-256: 311f696b481cd1da14840dd446bff2a9c9f4690a345be59f599cbdb3b50f50ec
font_02_sfnt_off0002068d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2068D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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