Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef2e3c3978befa7…

MALICIOUS

PDF

103.6 KB Created: 2021-08-05 15:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 298e08e139b1692e4324e75a21026516 SHA-1: aa7dae8fe0201141237129076ff454a4ea3f986c SHA-256: 7ef2e3c3978befa734c90b2e57d3d1da5f1b6144739af3cf38422f79c05f70e1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by a high number of external links, many pointing to compromised CMS upload directories. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pixomot.ru/uplcv?utm_term=bright+futures+2021+requirements+sat PDF link annotation
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610296fb11703---zimodefenuwuromovo.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a829396ea16---91556737072.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/55267140382.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/zusapufinu.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/20950744233.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/86321983177.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/2e6e3fde5f8a895a832f2544342aaea8/29041759593.pdfIn PDF document text
    • http://tremonttemplemacon.com/clients/862779/File/ragirimo.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/ru2l8oj3k52h3cg5jsfpfkg1jh/gomisusi.pdfIn PDF document text
    • http://placc.info/up_image/dasonadulodatezenosirero.pdfIn PDF document text
    • http://grubstreet.ca/ckfinder/userfiles/files/zodolibin.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee46addbeb---99387560288.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160d0a9355c4ac---22586225418.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbf05de241---rupunumikoxaxo.pdfIn PDF document text
    • http://aquarium-kochi.com/app/webroot/ckfinder/userfiles/files/juriwegopijif.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081621b35b52---81804232423.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/3ce87889223fd0bb62f77ba0a3f29539/wopumujeb.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/01aab4e0610ab432b214f1a6ed155593/20961369632.pdfIn PDF document text
    • https://fibaquitaine.fr/cebatrama/userfiles/files/8584213525.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/aa49dcc359125085884e5b860e793a65/77104391612.pdfIn PDF document text
    • http://elitvorota.ru/f/file/figiwonu.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021072205184873499.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_off0001338f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1338F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014ba6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BA6 11088 bytes
SHA-256: aaa97aaea3373fb1e0f93270c40fed024049a3a7468ca10c6d92b2a129d87334
font_02_sfnt_off00016524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16524 16916 bytes
SHA-256: 79c6e6018e7669ff189be70a237ed83d86fc0ea99e8b19e6ad5fe3a2d86ae455

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