Malicious PDF — malware analysis report

Static analysis result for SHA-256 c809c4f93c111877…

MALICIOUS

PDF

88.3 KB Created: 2021-06-28 18:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 6c79b6d62bbeea2328ac2360c00f2044 SHA-1: 5e68c824b8c4ae3fedeff6b325a0c9269bcf5652 SHA-256: c809c4f93c111877f6763158fa1ca9214f11435ccffa31f2aa87fc18818fdf84
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution campaign. The embedded URLs, such as 'https://coretry.ru/uplcv?utm_term=jay+z+and+kanye+west+watch+the+throne+album+download', are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://coretry.ru/uplcv?utm_term=jay+z+and+kanye+west+watch+the+throne+album+download PDF link annotation
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5704bbb61d---titurasunagukolubebixowuv.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/1kvhgprblfn07vq10il94knmq9/wiviboxariwupowa.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/63885660242.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/sirisodo.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/kazugosuvikidusawopesuda.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160837114e08bd---bugosupilela.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/wuvuxazudunijuvibazim.pdfIn PDF document text
    • http://ruresept.ru/files/file/85315413886.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/0ed76c1f36dfcfdc18ed930212a71fbd/zamajumuvorewuxavateves.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/8801443223.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/e486177d21c12204a0d925efd52a05f5/lonadatubemakenamexota.pdfIn PDF document text
    • http://fedoro.ru/upload/file/tejal.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096e04c36b95---sisix.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/diwebupupolatir.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/95464414628.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089af85a84be---gowilekajerimozo.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/edc072f7ad7905ff916ce62ff5a25a07/wejujarosetesugekinomuxex.pdfIn PDF document text
    • http://www.salpasafarit.fi/tiedostot/files/65195641045.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/tudapebavilumadatip.pdfIn PDF document text
    • http://www.argentum.com/wp-content/plugins/super-forms/uploads/php/files/8necbanq56hlqvdmiojqgvvpfa/gejesodomoviwik.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/26665431284.pdfIn PDF document text
    • http://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/bisovakenig.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_off0000e4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D5 24096 bytes
SHA-256: 3b770b044a3864e1b10de77de3f2cbda0c831b34e3d9c73cc3dfe126566ef2d1
font_01_sfnt_off0001215a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13971 11124 bytes
SHA-256: 58087ee3da83ec10b59e457eb28b090b106818e3866bade36412abf73159be7b

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