Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a14341e2fae0c9…

MALICIOUS

PDF

92.2 KB Created: 2021-06-26 02:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: dedf0f0f99269fefdfa278a091ee011b SHA-1: 31df61f38442f32ba6d2c89fb4ef914e07859256 SHA-256: e2a14341e2fae0c9e54b98924b1b5d692b7aa738b0babd11d8b820c93af170c7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple WordPress sites, many of which appear to be compromised based on heuristic analysis. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16088543a13142---81254404860.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dca9f2945c---lisubozanitexadif.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/qsdv0s4fkr3n2h20bu9c1jlaae/61607228637.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/d227ef08690f85e602825610b1776a22/76394132361.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07baee65da---feruzekejem.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/69778519499.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/ttvisbro6o2veung861olj25bk/sarosalovimijejixarapux.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b12d65d5052---21180282009.pdfIn PDF document text
    • https://e-fasteners.eu/media/file/63542700837.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/j15krkd97flt4l2n806bcsvre6/64129372294.pdfIn PDF document text
    • https://sunarchegypt.com/userfiles/file/73999723883.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/3ihv7qdc5nnm21khjd5g32hrl7/26008890021.pdfIn PDF document text
    • https://giustofiori.it/file/fukogobobowapikemagizulod.pdfIn PDF document text
    • http://centrons.com/uploaded/file/120992010960ce1d4b01136.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a458c7fd76---rukivikumi.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16089b1cda0cbb---gimixomenikixufefabosil.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/limetenijudiwit.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/j0l0rp2qbvami6kj16es3thv7l/sitirurusuxawefukujuza.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/naruzabanarefijapabitug.pdfIn PDF document text
    • https://stratasphere.online/userfiles/file/28280336942.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/pozobevuka.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/4d1368bfb3e7a2ca6371a7585a9a318e/kufivapigedudega.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1e4194827---70027921187.pdfIn PDF document text
    • http://targhevaticane.it/userfiles/files/82974246149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=the+first+computer+inventedPDF 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_off0001005a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005A 10808 bytes
SHA-256: 9ffb0423a9cc8110cfd689270ec2339193ea8e4e604dc820dcabe66549895d99
font_01_sfnt_off00011925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11925 19668 bytes
SHA-256: 52bf945c83cff40c96defbef82e6ba8dffea71f63fa44238e2fc98afd370cb60
font_02_sfnt_off00014b6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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