Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ddaee2fd253c63e…

MALICIOUS

PDF

107.6 KB Created: 2021-06-28 17:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: cc7e4ffbdff5b700dffc387226334e64 SHA-1: 7699e8735509419d5d39ce0613e956302b590f23 SHA-256: 7ddaee2fd253c63e537a9f7e4f65a3ecb163cada3d6c51c9f9249310b2f99e30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16075352ff1c18---2130699993.pdf In PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/sumelibofe.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/0eb2e42ecd5c31ffba59f0d35b189e45/juvabepuxaxap.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/fozupu.pdfIn PDF document text
    • https://go2germany.ru/files/file/fowisemut.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/qm8n6q8brm024t7tmpb2dk39f8/82312543621.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b9c4bea6ff3---jaruwoguzim.pdfIn PDF document text
    • https://syntellect.ru/Repository/file/50215129324.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/xazabopowijenefake.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/bugafenozufi.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad00e41650---31798899570.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/57278146131.pdfIn PDF document text
    • https://banderlogclub.ru/Files/file/13474976784.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/dejelavoxi.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/32101823532.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/juwezogine.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/62112392110.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607620c903ef7---7446000625.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078ba061e7f9---82764207129.pdfIn PDF document text
    • https://ubk-sad.de/azubi/userfiles/files/57517048233.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607beed8a2c33---21917025655.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b8e772b07---ketevutosu.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b92152e66---4165159424.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//tozusewowu.pdfIn PDF document text
    • https://londonvipchauffeur.co.uk/wp-content/plugins/super-forms/uploads/php/files/d12bd6968a2cfdea95589f8b953035a9/37105066439.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/91dc8fba47f5de7243f41a4932ed09ac/55396599460.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/2bf5e47f0924c4359b706c63879e9a63/10062511017.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=areolar+connective+tissue+examplesPDF 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_off00013e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00015654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15654 18744 bytes
SHA-256: d5c94a4f97ec5d0b11687cdd1579f1ca26af62a712dae3615dcbadad6cd6d7f3
font_02_sfnt_off000187e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187E3 10784 bytes
SHA-256: 9953974e982bae54d7ad457cbc4a8be90518b7865f55d3eddaa6eb54dfe73e2a