Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8dfb6f7a05fe027…

MALICIOUS

PDF

69.9 KB Created: 2021-07-13 18:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: f5a8cb522832e58280e6dd6bded466e9 SHA-1: d49189f0826b138050df48df458cd576aada9921 SHA-256: a8dfb6f7a05fe02760dcfda42a0541b33ecbeee8cf405132a84fba10e1d87d6a
156 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs and is identified as a link farm pointing to compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's purpose is to lure users to click on these links, which host other malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.ecvbrass.ch/user/web/file/pitamelisupewo.pdf In PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/f0e91le56uptgu2ln55hc26d38/mixuri.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/90f41e80f665b5cb9bc2c4558a74ab56/bagemafok.pdfIn PDF document text
    • http://kondicionery-krasnogorsk.ru/upload_picture/file/36348095749.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/0fb2bf6f705bb30a3195439666c6bf82/66818045022.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/57887163534.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/776084da8c2aced27519b4806fa0c5ae/65931338705.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/312e9dc9fdb3cda4040508fd59fb2e8c/65624095436.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/e8vkfs4g067icqenomnu1iv7vk/34489716254.pdfIn PDF document text
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d654455f2f---67219563923.pdfIn PDF document text
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/5eghoj7kt4hg06qu8to4udhd9p/91757825367.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/5e401a86128593030ac38d4b5a44bb6d/lirofexobetokodezid.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97f74acb09---dapavutep.pdfIn PDF document text
    • https://metricgroup.it/uploads/file/wewapuzexapalaxexufazu.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/peninuba.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/a7ejtehpaeq5agr0qg1thkv9a4/46709300102.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/18932927267.pdfIn PDF document text
    • https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/0e0b395080168f0a442d49307b1b796d/38159069466.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/tigobutomozimobob.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d24e4bf0447---furaponazumifujum.pdfIn PDF document text
    • https://travelstore.tn/userfiles/file/devafebejafuxeguwejur.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/14408317589.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/gijurafazepoxaripukutija.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=simultaneous+equations+mathswatchPDF link annotation
    • 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_off0000b742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB742 13980 bytes
SHA-256: c1b22ca8c15d12b06b08b1959c6f424030246385cc39a75ede9c3f07e03a1c75
font_01_sfnt_off0000d9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9BB 10800 bytes
SHA-256: eec3816bcf05036dca6455dae60a15d8d81072421c7979175566ca201de5afb7
font_02_sfnt_off0000f27b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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