Malicious PDF — malware analysis report

Static analysis result for SHA-256 737302604093aaf9…

MALICIOUS

PDF

92.8 KB Created: 2021-09-01 17:02:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2958877bf68261567e6bac758e595176 SHA-1: 472ef6cbbba02d41af6212f2f360fafa6125c2f0 SHA-256: 737302604093aaf92a9e404946f188dead84f07688cf4ac29f5f0daa948a450b
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous external links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://huntic.ru/uplcv?utm_term=you+get+the+best+of+both+worlds PDF link annotation
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f97364bda8---78608147775.pdfIn PDF document text
    • http://ihdbd.org/upload/files/zopekixasi.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/ip3na0ub2b808jq1mllliniv10/letogusebobibodamaniza.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/fejivilugolopofa.pdfIn PDF document text
    • http://enewind.com/pliki/file/jevetal.pdfIn PDF document text
    • https://epponline.com/mentorfinancial/page_images/file/jaxelosazerajomipujelaku.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/8fdfd3a18360615106138e512482bc54/57539525241.pdfIn PDF document text
    • http://agroanaliz.by/upload/editor/files/55054501864.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/mjilfeorndg8nuk8dlssdvk00f/vovirefoto.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c14edb126ee---venegagosaroj.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a59a8599c60---82297031495.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083393eef112---tadizitavajofuvuki.pdfIn PDF document text
    • http://kulturazebrak.cz/userfiles/24712417936.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/24572079608.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1ruadrdr66ok2il2j6mpc4lei0/71200109224.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e7744adb6---putuf.pdfIn PDF document text
    • http://qqwandai.com/uploadfile/file/suvavenolugala.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/94990311674.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/0991444d2f72d3d5f50b0462baba3f47/83918118422.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2d3c327f4---kukuxal.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16124a8f057e44---bidetapuwase.pdfIn PDF document text
    • http://strandedtattoo.net/file/zugonuwowosizizikuv.pdfIn PDF document text
    • https://samtee.com/admin/images/file/33688197797.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_off00010880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10880 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12092 17096 bytes
SHA-256: 7e205c35f2b6a812782ac5f33a0e7c787153a84a922c21025490dfbea3afbc48
font_02_sfnt_off00014ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CE2 10584 bytes
SHA-256: 7e22103d76440c004383697f52af89d4a584c5e330547b454e0396fd4b8d1780