Malicious PDF — malware analysis report

Static analysis result for SHA-256 714bf12e24ab6bdd…

MALICIOUS

PDF

80.3 KB Created: 2021-09-05 21:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 443ae76bbc2b67f20c7e8448f8a4d6c8 SHA-1: bba3df155331401d5604e051fefcf5338c2c6096 SHA-256: 714bf12e24ab6bddd97deafdb5b9969cf664e3455232246dbd7eee02c4fbd22c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://catamma.ru/uplcv?utm_term=istanbul+metro+map+2017+pdf PDF link annotation
    • http://www.peretprod.ro/content-images/file/pujolexa.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/lazawatewufemokexodub.pdfIn PDF document text
    • http://ackerviewguesthouse.com/userfiles/file/vubewawelori.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/ruguwujuxibagejiju.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30c859c6e7---20892993234.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160847895cdbcb---pegokunupo.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088992537c79---69286666290.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/faedd3b2ca8eef9d08023c85dfc0b977/juxudoruxu.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/662bbbf8ddb75bfaa20dc8b4fac3fe19/nisotetiti.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4a463f86b---95841080980.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160aff6fa0e419---75731508727.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/nidapavaxilumuberolisu.pdfIn PDF document text
    • http://elcwma.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/13605504394.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/tuzomedanurog.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/tawozuzo.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/lajenuxivavukenimuli.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/161296dff48b21---8434889516.pdfIn PDF document text
    • http://freetourscadiz.com/ckfinder/userfiles/files/72894846150.pdfIn PDF document text
    • https://yellowstonewildlife.com/90242629001.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/rerawovotubajofutinuzagu.pdfIn PDF document text
    • http://qazaqbanki.kz/data/content/files/marerojijiduzoveledepo.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/wizazikida.pdfIn PDF document text
    • http://www.startservis.sk/novy/ckfinder/userfiles/files/dawuwipajeguwivasu.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_off0000ca9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA9C 20284 bytes
SHA-256: 550d41df73529501bb76c0b763fc78d9533ef96bf23d345e62e7dc41f2e4666e
font_01_sfnt_off00010061.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10061 11100 bytes
SHA-256: 283e54d2ee8015859c8a3ea06f469ff8e2688f045df3458738eb73dfd9c4aff6
font_02_sfnt_off00011a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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