Malicious PDF — malware analysis report

Static analysis result for SHA-256 292ee311f50165ef…

MALICIOUS

PDF

85.6 KB Created: 2021-09-03 19:29:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1d6fadf5d37967635fe39b9be47fc98a SHA-1: 6ad45fd040162c2459a25bd2e034ee08e162426b SHA-256: 292ee311f50165efc551ed2dec4c7353db3592bc1d884e1e65110b882db0155b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's part of a link farm designed to redirect users to malicious content or phishing pages. The presence of these links and the compromised CMS upload storage are strong indicators of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4c0df1275d---dawemimi.pdf In PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b121db106---pugipelimuwigisisu.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160e49e4b16e6f---62435842146.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/90f1d005ff0ab45181b00b9cb4e05021/95027077269.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4071820544---julanenaniru.pdfIn PDF document text
    • http://soyaksiesta3.com/userfiles/file/35198195034.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/59176198708.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608acede312d8---89189124639.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a31a2d97ef5---2635702169.pdfIn PDF document text
    • https://dp-engineers.com/admin/userfiles/file/fojuxojotufomutula.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/nonurexedananawararakow.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611243b80ef52---62964181424.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160be978a3090a---27383590597.pdfIn PDF document text
    • http://busankid.com/webfiles/board/file///lezegitojefefaku.pdfIn PDF document text
    • https://ka-base.no/images_content/file/10500275349.pdfIn PDF document text
    • http://brlairport.com/images/file/71180566618.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/vlkn8atrnrt2avqpmg1f30q1kv/25661054021.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/96026265363.pdfIn PDF document text
    • http://stark-tools.ru/images/uploaded/zezazox.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/38011380322.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/dedifaxoxatapubulalafadom.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/vewadoxi.pdfIn PDF document text
    • http://hamlineparkplaza.com/assets/amund/ckfinder/userfiles/files/93962874387.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=engineering+mathematics+3+laplace+transform+pdfPDF link annotation
    • http://s292376414.onlinehome.fr/datas/imgmail/file/sogeperilozokodazivux.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_off0000dee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 11224 bytes
SHA-256: 81caa700c11fcb16348bf89bf99224cff28f274a7dd73fef245a775f515a44c1
font_02_sfnt_off000110dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110DC 21400 bytes
SHA-256: d2830000a43e59bacffa0191961c6492a975d1a27e4b89e1463218c773da95ea

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