Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2322a53c7b68118…

MALICIOUS

PDF

76.8 KB Created: 2021-09-06 05:23:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: cc88bdbdf44813ce2f7f09d1b8c55787 SHA-1: 7920fe002a5e0a4527a2abed99e1c8395c0bd521 SHA-256: d2322a53c7b68118771f84d4158dd50cd2d4ba61c1735a7bb4c84332dc6f3114
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. No scripts were extracted, but the presence of multiple external URIs and the overall heuristic profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://pixomot.ru/uplcv?utm_term=forever+living+products+pdf+2018 PDF link annotation
    • http://onlytech-tunisie.com/userfiles/file/ponedupozotakamup.pdfIn PDF document text
    • http://aivieksteslaivas.lv/userfiles/file/71172102129.pdfIn PDF document text
    • http://pentas.eu/userfiles/file/jovogidije.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ef400c5507---senajo.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/zidujusi.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/nvmq5egu8qfsndi5h1n2e9iok4/18998623453.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/bomof.pdfIn PDF document text
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/ac15afd119cb1f378b94270ed4ecd720/buladofomogu.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f18b40364c---83495424587.pdfIn PDF document text
    • http://www.domplit2006.ru/ckfinder/userfiles/files/babexututizodalokak.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607502e132ce0---68509793681.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/161233d5f8129f---natezexunudupovudazogodet.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160714060cb662---6211054463.pdfIn PDF document text
    • http://vo23.ru/upload/file/19552747291.pdfIn PDF document text
    • https://ichapps.peaceofworld.com/ichapps/ckeditor-ckfinder-integration/uploads/files/filiwabinuruw.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0c8debf39---23428096143.pdfIn PDF document text
    • https://bnovum.hu/downloads/44491351777.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/nawapofafosudis.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606f252798542---nuxepasinovofas.pdfIn PDF document text
    • https://ciar.vn/uploads/image/files/78497860648.pdfIn PDF document text
    • http://urologasdainys.lt/userfiles/file/98951122108.pdfIn PDF document text
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/2b510af7bbe176d65088c143846e94d6/49491855725.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_off0000c4fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dd0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0C 17576 bytes
SHA-256: 889dd0b2f2c1ebce76d6b34077956ddd2bc99f3b8070d05062aea7cda0dcd850
font_02_sfnt_off00010ae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE4 11280 bytes
SHA-256: e1a008ab5bd378d076f15fe4f24973ad842639cb93914b4edd067d49112bd344

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