Malicious PDF — malware analysis report

Static analysis result for SHA-256 c096fe33c9ae9e16…

MALICIOUS

PDF

92.1 KB Created: 2021-07-15 17:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9b85776510eb5962471e27e2e895ccf0 SHA-1: a4f772b0120ef574a765d6f13aa0d6ca93147dde SHA-256: c096fe33c9ae9e16aebc938e94025068d8751f99a307b62b7febac164b18d1bd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/95e4f064d65fd0b0f37743242830996a/pipenitun.pdf In PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609263964c7b8---23175641472.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a86ca7ebcaa---pegevowuwozimedutexijad.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/b9g49pjn15qgenjumlqq5tv2af/jonasadonerirugeroduse.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160701af7a6207---96450384500.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d3840a6ee466fb58bc3933f4bdea39aa/71290155028.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f0f2777f5811389bdc4b8df5849561a5/vigoxebudabepupuxu.pdfIn PDF document text
    • http://gshosnab.ru/userfiles/file/12108907012.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/repurojiravol.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/luvanisifode.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160aae913326d0---zufupawanirot.pdfIn PDF document text
    • http://heizler.hu/files/file/58762784406.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160751b9748ff1---34792832326.pdfIn PDF document text
    • http://wych123.com/upload/files/galofakugak.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eadc6a84cb---88786347631.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e06d6c6c2f4---13548336705.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/wasejipovi.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/4u1pu8sghakoncdhu30t31cbb8/56640291097.pdfIn PDF document text
    • http://school15-tyumen.ru/f/74718093489.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/d82df2f27929d43f1aa511a81585a9fc/3096481518.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/rfnmsm7ucheu0o2jndndjrcv97/jixukedumesesunubaxis.pdfIn PDF document text
    • http://myphamasia.net/upload/files/78673158999.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=prepatent+period+meaningPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 16092 bytes
SHA-256: 98bcec2be85b547d266a48c61dccc50816b624367bf69e2f194f2b8087d010f5
font_01_sfnt_off00010378.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10378 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B8A 17760 bytes
SHA-256: 4066caee86e3d01bbba824f7b2dd071823c6be8fde094c6602d4f698c64f707a
font_03_sfnt_off00014994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14994 10524 bytes
SHA-256: 22ddcd7b0c2b620ce9ffb6b6eb2102d66823bdee943173603bedbeae63bfb535

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