Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0e5f07e995fbc4…

MALICIOUS

PDF

85.0 KB Created: 2021-09-03 08:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4d8ac1e0f01eb4bb78e4d00e191be674 SHA-1: 1958cd357530391955588cfd7b3f1616e9ccb9c1 SHA-256: cc0e5f07e995fbc4f7394dee76d04d9b6db4335512c24bdc6b63a0721520e04b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to external sites, some hosted on compromised or disposable domains. This pattern is commonly used to distribute phishing content or malware, making it a likely initial access vector via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://ankamet.com/userfiles/file/88073527829.pdf In PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/6mpns1tkqej54b3armkuovn3gs/wusemubijuzemefadulemuj.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/d688fda6313c01f604fb7ce1cef70066/30756006581.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/51762342774.pdfIn PDF document text
    • http://klccpa.com/userfiles/file/jodisurunididiz.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/rumelinu.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/49145091252.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/4tkstuqec5ikbnh7gfj3h1hjj5/fujebo.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b38acb5c9fa---93946428971.pdfIn PDF document text
    • http://purifoy2020.com/clients/1/11/118d8b7ee1ea4bab8fb19da95c56260f/File/sulavedezemediru.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/qrdk056fmaqfqfm9c7pbvpsas7/50498006739.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608be2ce9a459---33977222599.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608e124da28c0---22791325795.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/7c1da264100432e29852d1a7832afe6e/22420384204.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160876d2898cdf---radutapadozowofilakaka.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606febf927b4d---49758498798.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/91496924180.pdfIn PDF document text
    • http://www.bsa.by/ckfinder/userfiles/files/18325811154.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles/file/91198351758.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/wipewigikugozimoxufenoxuv.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0a5151c896---tuguwijajawivutoxowe.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/xosigakapusigirojakut.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe3ba26a3c---88452736211.pdfIn PDF document text
    • http://dalaichau.com/files/kapumosufofedimo.pdfIn PDF document text
    • https://ctsgroups.asia/images/file/zoxurugusibetonuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=rheumatoid+factor+test+procedure+pdfPDF 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_off0000e6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A7 17800 bytes
SHA-256: 942f96e98446dc7360b8c2d952ba2bdcfeab40ab407348fa39fd279d86710517
font_01_sfnt_off000114f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F8 10880 bytes
SHA-256: 9c2939980e90cdd1bee5e26dbe06ad14c51c9b99105d64b9553fde10f2809911
font_02_sfnt_off00012e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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