Malicious PDF — malware analysis report

Static analysis result for SHA-256 f30460d12859eeca…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 14:22:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 973cbc74f987d6bffb0150d079ddcc22 SHA-1: 920c1bebeeb80b8df2647f9701984934e81a7e8c SHA-256: f30460d12859eeca8b7564daf8e154668c999a52f11978d65eaed595f8c99681
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery through these links. No scripts were extracted, but the structure and URL analysis point to a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://parfumland.sk/upl/40584450993.pdf In PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/88928820173.pdfIn PDF document text
    • http://phanphoiongnhuahoasen.vn/upload/files/19349082621.pdfIn PDF document text
    • http://airfa.it/userfiles/file/kuvisizimelawop.pdfIn PDF document text
    • http://kryotherapie.net/neu/userfiles/file/sajuxos.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/5e4a1c71038a1d14f038efdb50b60a8b/kekubewuwepapezak.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/a0d5cf09685baed214273f90200444ae/jotered.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/62796171963.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/86504315525.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613bace99f2fc---75200820286.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/kivixodobave.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/nodajikivonutanawulogad.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/bimosonovevudetedul.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/sorogufubar.pdfIn PDF document text
    • https://kingwrapcarspa.com/upload/files/buvajoferimaruzukevegazoj.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/36160838104.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131f55b0892b---notolu.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16134333fbbc1a---10133406872.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/vetitep.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/dobamanav.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/vugajefaxabutixilur.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/fopizozejalibodud.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/60141765636.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/tilox.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=how+to+scan+your+phone+for+spy+appsPDF 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_off0000d994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD994 10728 bytes
SHA-256: 439098b3bb91c5764d202a5476cda9d858c989d6f1582ace2a18a47c1fadfcd8
font_01_sfnt_off0000f242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF242 17420 bytes
SHA-256: fff1fb0808af401ceebd4667f7bd03266a12002b778c7b3b53c3d59dfe613a3e
font_02_sfnt_off00011fea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEA 2152 bytes
SHA-256: a3b3d76cd2b158a76ed728b4cb9aad6ca43a4cf53613a0ec9a4bd90369cc8d99
font_03_sfnt_off000129ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1