Malicious PDF — malware analysis report

Static analysis result for SHA-256 08ee36f7f519aa33…

MALICIOUS

PDF

70.9 KB Created: 2021-09-10 03:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1cfa1a182b1a8ec6191d9a882a47ecc7 SHA-1: 1427771ad60f85112213a8a5d0d4881de14b4de5 SHA-256: 08ee36f7f519aa339027a8c4f06e3aad437b336fffc2bd7fde66a801c9a4f49e
156 Risk Score

Malware Insights

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

The PDF file 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 compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body was unreadable, but the presence of numerous external links and the heuristic findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://absolutelyneon.com/userfiles/file/29511464230.pdf In PDF document text
    • https://weeb.nu/userfiles/file/41211672003.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/moxavuzevisabanuzaro.pdfIn PDF document text
    • http://khiensa.com/UserFiles/File/visigusomalosamevet.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/neruparal.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a88d95ae9---konedadaxomibotajuzato.pdfIn PDF document text
    • http://tdjl.com/uploadfile/file///2021090323210784.pdfIn PDF document text
    • http://michael-dhom.com/webseiten/file/32946458234.pdfIn PDF document text
    • http://old.bgk-meshkova.com/ckeditor/ckfinder/userfiles/files/kefuroxumi.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/72221279490.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/55669449110.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/vepebekejorajalupe.pdfIn PDF document text
    • https://inprovitpuertorico.com/ckfinder/userfiles/files/65918053072.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/98913024973.pdfIn PDF document text
    • https://socardan.com/userfiles/files/mixaruvuwuzuponifopufef.pdfIn PDF document text
    • https://electroagro.es/pub/files/bobodobipofugekelarep.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/d4b3b76c14e59b46a8b6ed34bd95690f/bivijituwazedetaw.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcf5a7c370---90090703276.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/14158312704.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/2934ce8299817413df1d067d9a3cc86b/93777052878.pdfIn PDF document text
    • https://www.dooleysnaturalgas.com/ckfinder/userfiles/files/75224928623.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/milesite.pdfIn PDF document text
    • http://kristiankutschera.de/userfiles/file/fizate.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/pobakagenulo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=is+it+possible+to+view+instagram+private+profilePDF 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_off0000b491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB491 15660 bytes
SHA-256: d710440707b6c83d3e52280267de58353fc3b7a87ae566f70a4c58bc9df136c1
font_01_sfnt_off0000dc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A4 10944 bytes
SHA-256: 6207eac3494b390053822bd95ce88f6c69fbc3332d7b90979514af5afd22f4a9

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