Malicious PDF — malware analysis report

Static analysis result for SHA-256 72640ca0445fb320…

MALICIOUS

PDF

84.3 KB Created: 2021-07-20 17:49:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b74d810d7aa68f4cedfcb3dc0cb9dce5 SHA-1: aa0eb9e44cd67571bed825a76de3fbc5382fc3d3 SHA-256: 72640ca0445fb3203de054b23b80cd389268bcd3085bfb2b8fa765bdf4cc3c94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to compromised WordPress upload storage, suggesting a link farm or redirection mechanism to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure.

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 http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160864fb76c458---7808661423.pdf In PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2a4cabe25---45864695225.pdfIn PDF document text
    • http://veoguidecostarica.com/ci/userfiles/files/melobimu.pdfIn PDF document text
    • https://amthanhanhsangchinhhang.vn/upload/files/90730848950.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa4dcc8544---kabalutiduvetojebujijiwex.pdfIn PDF document text
    • http://prmakeup.com/Image/files/sapup.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/1882869879.pdfIn PDF document text
    • http://shreyaghoshal.com/konadnew/userfiles/file/mubuzuluwezeporuxusijipa.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/73630925891.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7beb126be---risedakexofenosebimowaziv.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/lupasovitojijowuluwujozo.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160865ec91f337---45936943744.pdfIn PDF document text
    • http://geose.ru/userfiles/file/samakoj.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790f916230a---4524892923.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/j8u5hmpee92nnk4jvotrhtljr6/48955048250.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/4d0e7449dfc4cd74fa05d4a7fcbc2871/zibolixunobuxojabali.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b749fde122f---77437263627.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/10048581328.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6760194f7c---1746554601.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/ph2ebi8sml722f6hvgnqd7ovd1/97378007513.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/44ec2ed12eb13cd310c71b84e51730ff/nivazikaju.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/8624c97efc7dc5e632ef944315b08381/2339337210.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/kipusadevigunanijizulini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=assignment+of+real+estate+purchase+and+sale+agreement+pdfPDF 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_off0000e48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48E 17332 bytes
SHA-256: 038a949ecae2c89ccbb5a3955e3f0910ce7838b89ec4e08b565fb3142daf563c
font_01_sfnt_off000111a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A8 11148 bytes
SHA-256: cfe797ead4c784b2bf088f34ea4596794069a6e0a2ba5b3e89a3e2c066bd0638
font_02_sfnt_off00012b51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.