Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea826ceef436f837…

MALICIOUS

PDF

88.0 KB Created: 2021-09-22 21:03:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 293725eacb842ab30ea52e95f6442b7b SHA-1: 6850fd6c537e46146be430bd4db0f6d13f6d928c SHA-256: ea826ceef436f83799bc9fe4cdaa8ec5eda0c2cb73affdfad427c45aa90fe871
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within a PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=the+quiet+place+2+full+movie+123 PDF link annotation
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/c89c953af86c55a40f6b23a3816b2171/60988857511.pdfIn PDF document text
    • https://mklaassen.nl/images/file/93495984076.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/nurulofumirud.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/79961725179.pdfIn PDF document text
    • http://stadion-zarya.ru/ckfinder/userfiles/files/57180834674.pdfIn PDF document text
    • http://xn----0tbbbfo0f.xn--p1ai/userfiles/file/xejatikogezaturujavutex.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/dixajakejebotijuk.pdfIn PDF document text
    • http://reichspfarrer.sk/file/davuxidodeto.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/wuzebuxekoxuta.pdfIn PDF document text
    • https://www.cdsale.org.au/application/third_party/ckfinder/userfiles/files/lodelinu.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/10859055898.pdfIn PDF document text
    • https://baglab.pl/galeria/file/64050035351.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/lopisetetuged.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/62434713472.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/81339207554.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613db4cbb162e---13176991978.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/653476b2cca7c4e021815742a5f1e14f/70001644886.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/bbbdfb5c2aa9a1248e6b1ce794e3db87/ramurajodimek.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/70205763184.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/babitigajosiguk.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/64574824764.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/47030589385.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613694d435fc6---denaximaj.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/jirasokikubogibodaw.pdfIn PDF document text
    • 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_off0000eedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDF 18704 bytes
SHA-256: f213d5eb088729d6530a24794306bf07a7b1dece88ccf43b7c95175247fe2ef2
font_01_sfnt_off00012065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12065 10992 bytes
SHA-256: 1ecd93cf954b69577639bec8c0c2e79c7316db09eadf15c92577804d6f580571
font_02_sfnt_off00013a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1