Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd046030e835ea05…

MALICIOUS

PDF

97.2 KB Created: 2021-06-29 09:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: bf8b716e4d4ac0275cb5ff6e60a91955 SHA-1: 0b69c1ac05e6d3542341b0184657def2ec7d8510 SHA-256: dd046030e835ea0514d8eb4e3e536df32002c52074ba9a33df8969732e4d1ae1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous external links, many pointing to compromised CMS upload directories, suggesting a link farm or phishing lure. The PDF's structure and embedded content indicate it's designed to redirect users to potentially harmful external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://nomylo.ru/uplcv?utm_term=php+ide+free PDF link annotation
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/71404d5d331219f2c81cb329ef717185/92509658354.pdfIn PDF document text
    • http://divorce-difficile.fr/userfiles/file/13550394745.pdfIn PDF document text
    • http://deckdreams.ca/clients/3/34/34055ef41782f8f15ebf372c1e39ecad/File/25912129251.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/53614478020.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/gosibaxarurofinekudiloro.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/84538865720.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/08b98857926f40f131716107fe715b99/77881252300.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/mr0ku8l0s2vp1nq2mi7u2q9jk1/dekufevurubojula.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/misiwezutol.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfa279a37d---65685764405.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/godimolukadena.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099cbe12a528---27851040858.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf96dbddf33---rotoje.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/wubojukibifomexelu.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a145eb05be1---37623199950.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f31394271e---sujomeramegizopozu.pdfIn PDF document text
    • http://buildinggodskingdom.com/webcms/file/pemisumofeporopapi.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c256a1c2ab2---62702617905.pdfIn PDF document text
    • http://keramann.ru/uploads/files/pudubukefimimiroguran.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606efef14e4d8---jimawoditusus.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/77573746178.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_off00011ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CEB 17432 bytes
SHA-256: 68c74f7d919484ae35f8ca89ce145984688d93b396b491e85b724a1ee85d026e
font_01_sfnt_off00014a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001624d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1624D 9900 bytes
SHA-256: dab3d47b9203a93c37edb5f88ff675a0912df2eb6d82f498e53346627f7ea4fd

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