Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa204d3aad03145…

MALICIOUS

PDF

88.3 KB Created: 2021-09-05 11:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 1379712b3fc8c39a0e76307dd4f0dd0c SHA-1: 82c5f746d15ec4017f102599e5ea8a297d253b28 SHA-256: eaa204d3aad0314511a4b06e6f6ad5cc3c0a25d7f9852afb8da300b55d268e84
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which are hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of embedded URLs and the heuristic firings related to URL link farms confirm the attack pattern of directing users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://irlanc.ru/uplcv?utm_term=manual+roland+xps+30+portugues PDF link annotation
    • http://zjpjxt.cn/upload/uploadfile/file/75401068624.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/8168410167.pdfIn PDF document text
    • http://dzbnf.com/upload/file///90658642302.pdfIn PDF document text
    • http://gabortech.comadmin/file/gexedim.pdfIn PDF document text
    • http://2016montemayorreunion.com/clients/e/e5/e530e98a7ee505477716bae2fe71cdef/File/fawazigumolatafekawirada.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/20096731259.pdfIn PDF document text
    • https://travelone.ae/userfiles/files/32552057068.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/zuvojopera.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/cd5578ef94c1ad68638880e08e1535a4/48884247356.pdfIn PDF document text
    • http://carraracucinecomponibilitrapani.it/userfiles/files/dugewuvo.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/remikefijuwalod.pdfIn PDF document text
    • https://mkontakt.pl/dat//file/tilolar.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/tavadotunijabemadufi.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/63746962425.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/80818779958.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608567f9351e1---damojixijaw.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3ea4c19ae---lanorajenarufotefodupoluv.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c48ea37e4a4---75293560475.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/lezim.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/5b40cfdae736b1ac80edd9a4c34acfa9/wivedutokobedoxikefe.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d049ac6845b020b360a15a552672b40d/fesodabelixunom.pdfIn PDF document text
    • http://mim2010.ru/userfiles/file/nigusenizabuvikavu.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/14659892650.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/47750242720.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_off0000f430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF430 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C47 10964 bytes
SHA-256: 6698bf08cfc4f6851b4b7be600436d646095e0c46392d4578a286e3649ba453f
font_02_sfnt_off000125b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B0 17452 bytes
SHA-256: a05cb05215294d640750e738dfc4f11a8428a21d21b06fea124c4e6c1c92e15c

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