Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1a44bd8f4fdf0e…

MALICIOUS

PDF

95.6 KB Created: 2021-09-08 01:48:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0c7a13184552d94661dfc1a940b07932 SHA-1: a122f6bcf77e91494bfe8e5b79a22150d4d7a1e5 SHA-256: be1a44bd8f4fdf0eeaece2fd49f35b30ba1bef3a2b71928ede02d7ed44a9c174
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/uplcv?utm_term=hybrid+energy+storage+systems+for+renewable+energy+applications+pdf PDF link annotation
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b7461953c9b---65574220089.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d37a025464d---23775676446.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/60369708485.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161364de83f8ed---1138892540.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/tirumodupalejubivaxik.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/79828086200.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16074adc2134ed---33843654443.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082e9f538bb1---71111677532.pdfIn PDF document text
    • http://3q1p.com/upload/file/2108010555516516261tc5umuvph6j.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/43926911554.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/zisutimudufegitolufo.pdfIn PDF document text
    • http://www.forteks.com.br/admin/ckeditor/ckfinder/userfiles/Images/85853287105.pdfIn PDF document text
    • http://mobilni-kadernictvi.cz/files/file/papojukisapalajo.pdfIn PDF document text
    • http://plagij.at/ckfinder/userfiles/files/gusoxusiraguxafowexebexok.pdfIn PDF document text
    • https://grandplaza.bg/uploads/assets/file/68265443329.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/16125066a6ca4e---65213493809.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082787141289---57113240255.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/a21769aa9e24074005830602131dd8e1/89777693312.pdfIn PDF document text
    • http://thanhcongtechtra.com/upload/files/kimalosorisunoned.pdfIn PDF document text
    • https://aznamaste.com/ckfinder/userfiles/files/2810469844.pdfIn PDF document text
    • http://ingpiazza.eu/userfiles/files/70505304830.pdfIn PDF document text
    • http://chinocorporatechallenge.com/clients/6216/File/zubikukigenezefe.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd870c9255---92267047513.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/61245234526.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_off00010998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10998 19840 bytes
SHA-256: 42306c3a01eea0b771c242f632fe8b1efb2fe2735bcfd6d6d2d68f4ec1cb3922
font_01_sfnt_off00013d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15580 11292 bytes
SHA-256: 11833bbed53f179e4253c8fc3c883b34ce5ef35f41e2c6a9ce6fc9a1bf29d854

Open this report in the interactive analyzer, or submit your own file for analysis.