Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0dee2747d21602a…

MALICIOUS

PDF

78.7 KB Created: 2021-09-23 00:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fe5bf86ff6700158b4b10552895826cd SHA-1: 071a238d17643ff71e2136714d3dfb5a92c74c25 SHA-256: f0dee2747d21602a1e4032ad3931810d2d3602b86f93e98411e2543569bd729d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URI heuristics and link farm indicators confirms the attack pattern of directing users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://pistant.ru/uplcv?utm_term=race+the+traffic+mod+apk PDF link annotation
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135dc7db2308---kafapolaviwaxa.pdfIn PDF document text
    • http://0vote.com/ckfinder/files/65580950161.pdfIn PDF document text
    • http://lisaarkin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fuwug.pdfIn PDF document text
    • http://symbioticlifetech.org/attfile/fckimg/file///202109167317_259125829.pdfIn PDF document text
    • http://rqconsultores.com/userfiles/file/dukogi.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145547ad7085---10752276894.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613feb557d315---jogimokijebifigizefoj.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fb5692a3cf---nojovowodowegasidoxi.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/tiduvoxazoti.pdfIn PDF document text
    • http://littlepearlspublishing.in/data/eimages/file/74981685708.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/66984004762.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/abd6b13883a9ef281f55623637dfc516/wexamudufujalu.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/niwenutogujexoruxit.pdfIn PDF document text
    • http://www.hermosabeachbungalows.com/userfiles/files/80927371060.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/e56c726a0e6055ce2f6b8d97f34ee6a3/75504697035.pdfIn PDF document text
    • http://ky-auto.com/uploadfile/files/150914780.pdfIn PDF document text
    • https://dogodanang.vn/uploads/image/files/47529798449.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021091008251128.pdfIn PDF document text
    • http://babyshelter.net/assets/upload/files/52423900093.pdfIn PDF document text
    • http://briquettemachinery.com/d/files/33590970205.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/161454b32ac4da---93516207843.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_off0000cbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C1 10704 bytes
SHA-256: b9cc44874d4e7fc77a0b1e41f0e6d6dd7112b82e48e40bff298712bfee6e9d7d
font_02_sfnt_off0000fc54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC54 18788 bytes
SHA-256: aaa21690b6846eda2dacc0f0ea3dc3373d50d3cbfadbcae26509d0d3b9e48540

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