Malicious PDF — malware analysis report

Static analysis result for SHA-256 d096775cc0d37ec0…

MALICIOUS

PDF

89.1 KB Created: 2021-06-27 06:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 999b7ba87978e021a5a0f46b21fe4b7e SHA-1: 7c26d218d127c38897743479a799e9fa1224a52d SHA-256: d096775cc0d37ec06a315dcb9c47db5d8194f0f755d7b3daf2359c31af528334
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised websites and PDF files, indicating a likely phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple external URIs and a link farm heuristic confirms the document's role in directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://zimmerei-possert.at/gajuliwovopodirawe.pdf In PDF document text
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/buslkc8kei3fadtkd1admuetmn/92957720182.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/c8bdfe9ccee95ffe9ba681ce54f068dc/nigepodega.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/58422418865.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/9ff665e28aa02faa9d52dc8be62791b4/bised.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/28530398994.pdfIn PDF document text
    • http://centreforeffectivecoaching.com/media/file/11185893006.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/modesitevuvopejusajig.pdfIn PDF document text
    • https://thietbidienmanhcuong.com/upload/files/jegibetobokitorigosime.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/munonol.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/51139848048.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609304576699c---85308546740.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/16088df6adb4ab---potewabopefidefuzojegi.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c7b47fa18---34956441685.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160adce975dcf6---tuwerevisa.pdfIn PDF document text
    • http://ausafe.net/images/art/files/76218922280.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/lakaxurufusegatabopowoke.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d03f3e6bc---53741386093.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a1f4bd587---domunaxibojarirasu.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/fitepuvifuzawuwo.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/15786665413.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096997c6073c---gawuneba.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/49416939528.pdfIn PDF document text
    • http://stellamaris.cz/userfiles/46733480087.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=normal+body+temp+for+babyPDF 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_off0000fb84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 17052 bytes
SHA-256: 6e1def2fb8c72569cd094527e70262c81b5e42417bef63d37ba0312686a1941b
font_01_sfnt_off0001279a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1279A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FB1 10524 bytes
SHA-256: 9ba6c6e50b9dff7456bbdbd339d15d197c760263ccc2eb88e51702e605fa2dad