Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb47a54457c0ce0c…

MALICIOUS

PDF

78.7 KB Created: 2021-09-04 13:24:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 12016a9bf77942f51c6d414acf2c326e SHA-1: 5b682554c9551281c30ea10394cacc307e1302d0 SHA-256: eb47a54457c0ce0c90f5b262ea43c1da7f3108b98847e3a39b97529bb2ddba80
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users. The primary purpose seems to be directing users to external malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://irlanc.ru/uplcv?utm_term=ruptured+uterus+pdf PDF link annotation
    • https://kermanrooz.com/img/files/66303579743.pdfIn PDF document text
    • http://ruihuitax.com/files/file/vixopediwixogumarulepugol.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160767a59d6eef---fejilotawe.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/vomesilonarez.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/f58c14f5e1fcfae055a2425100b2fc76/rulorunofax.pdfIn PDF document text
    • http://spad.kr/userData/ebizro_board/file/vewulofafijuvemed.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090a2f2f30e1---dazulukazab.pdfIn PDF document text
    • http://kutscher-customs.de/gfx/userfiles/files/29935263379.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d5518411abd---lesuputijaboduk.pdfIn PDF document text
    • https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/6c6a116e1f8502c3d1d43d3b9a35fc96/43615940583.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/pusajofereguwi.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/2a609a8c7e6ff2c819cf81c864cac412/46831748301.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/keweroveruxupamu.pdfIn PDF document text
    • https://heyratacademy.ir/file/gafugepudemuwixozur.pdfIn PDF document text
    • http://geriatriccarenewjersey.com/userfiles/files/41823333533.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/57476727236.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/winifufixasegavun.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/b9496448d445710ffd86c29a637fb734/29931575054.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d669cf4365b---96317730837.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b618a83452---gadabaz.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612948ee5c109---90460171903.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-7-9/20210709081553980486.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/bc59ee2143632960568b5cac19a0b81f/wudowenegabubaselasubipa.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_off0000d038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD038 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84A 17644 bytes
SHA-256: 5e7c8fef3277da3affda367ae8d003866a0e75b572821c50b3f6f6d537bb7706
font_02_sfnt_off0001169e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169E 10112 bytes
SHA-256: ba6026053cfab6ff7cccc23fc6efbd1ee48c626a98b9e1cda9af98ce88c14ed5

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