Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f65adbe02db046f…

MALICIOUS

PDF

83.9 KB Created: 2021-07-15 09:35:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: f2afeb4292e27a301e6e92ea68ecddf8 SHA-1: c4f2ddafac48a8382216b18740b5c08884e060a8 SHA-256: 7f65adbe02db046f064785d0a511a52106b2ab5971486c407b119c95d448b1b6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness, with the PDF containing numerous links to external sites, many hosted on compromised CMS platforms. These links likely serve as a lure for phishing or to redirect users to malicious content. No scripts were extracted, but the extensive link farm suggests a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://irlanc.ru/uplcv?utm_term=assessment+test+answers PDF link annotation
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160928f0c76a22---61158385143.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160b6dac13c38a---31730445198.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/d7b0db4bb26f7789f9f6f8ae29a03f9f/5950498686.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/3fcddea132f156dfcee85c1b8d30de7e/befibozunoxudakofupod.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa0336f800---10983606176.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/rorameruwonokekamiv.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/guzuwomenipixaxomuwex.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/qq7pc4628gl7oma81vf6hfqvns/ragitaranipila.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/detiwox.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b5a9b6d5cad---pobimatizagexedi.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e785a98910f---tujafimufemevojof.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b12f83273a---bajebasafez.pdfIn PDF document text
    • https://swalaya.in/userfiles/file/pajaxariwajoloxejugarogu.pdfIn PDF document text
    • http://cy2hand.com/userfiles/voxekibuduwisigene.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/lunanotevodenozetabup.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608186fa1cdfb---tiwijipujeletebaxu.pdfIn PDF document text
    • http://imaginove.eu/data/Files/61297200499.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/xexakozijimazos.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/o3dp79vdrn6r1m3e08cktur1qi/17094857493.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/43146775391.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087f7c231ebd---lizotazan.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608529347bc81---94113201095.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_off0000e785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE785 10076 bytes
SHA-256: 1e39516aa18c0252550b987b393bb7d2830d5df18871d1c0f1c84126546a07f0
font_01_sfnt_off0000fe04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE04 17088 bytes
SHA-256: 3c095c8d72d3814f9f53709833200bb4199386ea2c416427c7f67d512d13116f
font_02_sfnt_off00012ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1