Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c0978499058bcd4…

MALICIOUS

PDF

82.8 KB Created: 2021-09-19 12:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5d5bc8ac9c678fa498ba542c5064f202 SHA-1: 27f9d7fb04fc26779d62156f5b69a96f4cb49bfd SHA-256: 6c0978499058bcd4c8cc50f458cd42338b6cf113a4aa35481fe305b1ad1e8f64
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, many of which are associated with disposable hosting and link farms, 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 numerous external links are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=reading+test+1+sat+answers PDF link annotation
    • http://gddfboiler.com/uploads/files/99719300826.pdfIn PDF document text
    • https://rafaela-motores.com/userfiles/file/wotegawuxitizobe.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/32370417661397ad7cf264.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/fituvawuvo.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/75142809569.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/zodisafoxabamu.pdfIn PDF document text
    • http://cungcapbaoduongcuanhatban.com/upload/files/10019165476.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/29213244144.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/kigajateduzavor.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/ruwowesinusozipepug.pdfIn PDF document text
    • http://bgindus.com/t/tutorfirm/uploads/ck/files/xujesimarada.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/355022246.pdfIn PDF document text
    • http://xn--2o2b17g32e8xisqq.com/userData/board/file/tinetagaxonarofifabovux.pdfIn PDF document text
    • https://degardo.hollandpazsit.hu/ckfinder/userfiles/files/1444066722.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/68572572928.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/94473020781.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/sesejanoxidotasebivip.pdfIn PDF document text
    • https://sindonis.com/userfiles/file/wejazumubejevetodezek.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/ccd23866e146e187fad97a41a7151dd3/5677122271.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_off0000e0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E1 10440 bytes
SHA-256: a996c418d7befaaa77a8f7b5c43d16ad313c36be418214744ec6ffa69290ac5d
font_01_sfnt_off0000f893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF893 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110A5 17432 bytes
SHA-256: d173dc0b7d8c999fbb9d6bb59a3a9f33618cb0df2f1e678c0fd0ab808bfe09f9

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