Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de26d7d67acbacf…

MALICIOUS

PDF

97.4 KB Created: 2021-07-22 04:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 02278b45afc939f03a596e756f259d1f SHA-1: 826b5d8078a0470a14511d426f0f2777305c522e SHA-256: 7de26d7d67acbacfbd356d9164b28ef619cb46e45ecae2775dcd898b9bd720ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a link farm pointing to multiple websites, many of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic findings and numerous embedded URLs are sufficient to assess the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081601a933a1---wakebipijetobupoba.pdf In PDF document text
    • http://bet-balance.com/userfiles/file/vebalufu.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1606da72adf9e0---latatonagabudivogubik.pdfIn PDF document text
    • http://sansboundaries.com/clients/f/fd/fde0d4b6b324343791c5f0705b221951/File/93849185578.pdfIn PDF document text
    • http://1qjd.com/upload/files/2021-07-22-05-46-57-2RSUoNe7.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/kb7dft6ubv8q2dfnoq8mqjp2h7/17195471043.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/eb8dc632b85a117e0d2d731bc4bc9bdb/gixegagol.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/47882703108.pdfIn PDF document text
    • http://willismctyeire.com/clients/c/cd/cd1fd5262213d36872a77bd42df049b7/File/43346813619.pdfIn PDF document text
    • http://konsultacjenaukowe.eu/Upload/file/34115699269.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746fbe5c496---nitajupizunifetevodorivij.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/66ce44f07a6ebd2e38d1c0b97830a8de/89364949220.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/l8kpbj57uh2kuah1pp3qfkpfnm/xiteberepesinefozadezaxa.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/c3cdf7d3effc8448687fac07ec6d5c53/63709100089.pdfIn PDF document text
    • https://homecareangels.ca/files/files/files/ralikakezase.pdfIn PDF document text
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/51211c3a473d714a1c79ab7792061cd0/65764586362.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/98593399605.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6e062572f---xobefimipu.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/fowimegedisowovejiva.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/pejoxonobo.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/27254371898.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/66625893384.pdfIn PDF document text
    • https://actor-conseil.com/files/file/tesalajuvogiminorukuka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=lee+circle+new+orleansPDF 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_off00011861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11861 10168 bytes
SHA-256: cf7af6e03cff09f15d51c8ec481cda0d090aa8ee82fce7f373139e8c79f76ab1
font_01_sfnt_off00012f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F40 18336 bytes
SHA-256: 1f6944511956e5d0b1c9099e0ba45a20586a1c5fc84ce6647ea5495b1dc8c816
font_02_sfnt_off00015f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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