Malicious PDF — malware analysis report

Static analysis result for SHA-256 305e9c65be7c1fbd…

MALICIOUS

PDF

75.7 KB Created: 2021-08-28 08:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5e799a08c885cdbe8be7240ead30ae6c SHA-1: 29f68480975fb7a950f3532bf1317d3e3e876196 SHA-256: 305e9c65be7c1fbdc7abe486a22c7d0a4a7b67a379c6fa78841bbcc347f6b786
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links, many pointing to compromised WordPress sites or disposable hosting, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this PDF is a phishing or malware distribution vehicle.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://thucphamchucnangmy.vn/uploads/files/4860012444.pdf In PDF document text
    • http://allprintusa.com/admin/images/file/pozuxojudu.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/8m4ipd9mcslsh0bi9sdhardmkn/1427100003.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ldn69tfb5f0a0hp8gg292dijrc/mukerevemaxenep.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16100873ac412e---87627602516.pdfIn PDF document text
    • https://trotusgrup.ro/ckfinder/userfiles/files/66933565795.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/pologomozuforomabe.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fe9e669d49b---vodeno.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/idana74ooeu6re79v9ll1smb61/65204660306.pdfIn PDF document text
    • http://mpwlawpa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ziwigipatasagavuzaz.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/nunoferune.pdfIn PDF document text
    • http://hpmcfamilyreunion1968.com/clients/83891/File/87388267550.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/e7b36f9ded9fc9f337274e7a48dc29c7/jikuvelo.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e3029d0f5---21168414258.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/xulunazinoletuzebe.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/89126764650.pdfIn PDF document text
    • http://www.irrv.org/uploads/files/27801098395.pdfIn PDF document text
    • http://rapet.hu/files/86425298963.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607307cabd7d5---bozowufadekolad.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3cefa390f---wemizibi.pdfIn PDF document text
    • https://przyklejki.pl/userfiles/92086967434.pdfIn PDF document text
    • http://hanasushipickup.com/uploads/files/71625973105.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/gewogunisezoxufege.pdfIn PDF document text
    • https://stegopackaging.com/wp-content/plugins/super-forms/uploads/php/files/scapb9hqj25ogdv2pco0874roi/9588709382.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161172dcd774d5---64952135619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=head+in+the+clouds+sayingPDF 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_off0000c4c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dcdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDC 10752 bytes
SHA-256: 11e535af65031fb9ef03d15316d1391d149ee4b2e4365dfbb6eb53b51f80423e
font_02_sfnt_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 17116 bytes
SHA-256: 3bd9eaf07161065c5ddbac2e49cd7676f13d0f7186b6e9f6dc7dae94f26848b4

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