Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f76dd58772479a…

MALICIOUS

PDF

77.9 KB Created: 2021-09-01 10:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9f7958b2e9b1630552bf844ead0e27d8 SHA-1: b2dd11b51833d502b29fc2be18cb243b2e9e063e SHA-256: 69f76dd58772479a2acf76d3df016b561c3fb9b01cf864b1c0c8f34857845d39
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9829

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://philabc.ru/uplcv?utm_term=under+the+dome+season+2+episode+2+watch+online+free PDF link annotation
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/7k9t6l2295s8lt6tdpncr1oo9m/gexisiw.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/49353347900.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9c38b83ba---pegiraro.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/2685993228.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c0bbae36fae---kajasugidugezaluwu.pdfIn PDF document text
    • https://www.sherpachristain.org.np/ckfinder/userfiles/files/rokugoweresagatugazodufe.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e842d84946---5472057074.pdfIn PDF document text
    • http://kalikraft.com/images/file/50966532895.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/84178090121.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160885c3461f2f---16792520501.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/48385927358.pdfIn PDF document text
    • http://mintaialuminum.com/d/files/3103828885.pdfIn PDF document text
    • http://coinproject.com/userfiles/image/file/bikubijuxujijawizija.pdfIn PDF document text
    • https://amsteroverseas.com/ckfinder/userfiles/files/79299741380.pdfIn PDF document text
    • https://datajournonepal.org/files/5208320304.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/gagukimazebafaxovewoke.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608680baa9dab---31445762085.pdfIn PDF document text
    • http://willbramephotography.com/dalujamapikulifuwulalos.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/pjml5l9v5l43nse96deho95usg/finewixovibe.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/61749398920.pdfIn PDF document text
    • https://balbok.net/admin/ckfinder/userfiles/files/66396697155.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860858f2dea---zodarezirekexikifu.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/5945801581.pdfIn PDF document text
    • http://marymo.ru/uploads/files/fepemanosegafemifu.pdfIn PDF document text
    • https://barcelona-health.com/files/galeria/files/gogaxewevilokiw.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b3a2519e5---76756171439.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_off0000cd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 16512 bytes
SHA-256: e1bd0fe022a5e106df3989e9d1bb4aa359fa03268373e6536b2da481c1dc9737
font_02_sfnt_off0001101e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101E 11100 bytes
SHA-256: 5915b73e63a5caf57a8dee2bafa9605b65fc4593b23d14f9b0fbd906251bbd44