Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7fd5b15ba282668…

MALICIOUS

PDF

92.2 KB Created: 2021-06-30 13:06:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 19caa2c00bd438332ffcc550572b2612 SHA-1: b4e6aa10521124044406f295695309cfad111272 SHA-256: c7fd5b15ba28266830971b2246b521cbbdecc3c5e5dc946ff719ab18e3fcb89b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content or downloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://radiosmile.hu/upload/file/34675925324.pdf In PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/abde6da506a5bb09036b07823aa15a33/25096495870.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/3b8e8b1660e88297ae3b61df81996c11/podusesoluremages.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad415291ff---lujapufimebemor.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/2233651373.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/89872765116.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b805b0131e4---10500755888.pdfIn PDF document text
    • http://askort.pl/Upload/file/minebaziv.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160732316e63a1---70186667609.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/lefir.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/penerapi.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/bff7299c3e8f610bfc3ca4f7f5bcefca/sizopififalonajinuleveni.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/272302442891.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae5b3293ad---wodexidixupa.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/gocvg2jtp5ucdvg29dis93dcl2/37001474448.pdfIn PDF document text
    • http://christschoolblr.in/userfiles/file/39685879552.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/a7fd35ed6d0bd21c5c57eaa16e3a7cd6/24986716932.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/faxalamanojoxid.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/5qarkobdho4dpsb6q05ornau2o/lipekojenu.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/difikiwolilu.pdfIn PDF document text
    • http://samrayburnclassof1980reunion.com/clients/873185/File/65593246329.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/80801584773.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/160affb0990fd2---wabumarizonamefo.pdfIn PDF document text
    • http://zxsolar.com/d/files/dileronikon.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/6ns06fg5kq5lcavhoodpvbbhtk/84550352533.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=download+the+sims+unlimited+moneyPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED07 17180 bytes
SHA-256: 067048bcf3c75be8344bf6c0ef17d3e43cd8998c10bde63ef5cfe445a9d5f215
font_01_sfnt_off000119e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F7 10712 bytes
SHA-256: 02b077a7351f5000fa75318b83333f8f5ec922632ea498ca0361a4d94b2044b1
font_03_sfnt_off00014a6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A6B 17608 bytes
SHA-256: 3751353efb0b27d378aa1cd8618b1c705c190401913f411e102f9b087035a269