Malicious PDF — malware analysis report

Static analysis result for SHA-256 02c4140a02bfd3b5…

MALICIOUS

PDF

76.7 KB Created: 2021-06-28 14:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ad7b407bf9416051eacce098e0f296f SHA-1: edc6f0c95bf771f30d8a4ce24c1f8bea60b97206 SHA-256: 02c4140a02bfd3b5c95c6f348d2420020f552947fd2bc91e8665ce42412faa9b
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 WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/d263a983e4e251d0966bbbe6cdb17d30/gakedigetufanusoner.pdf
    • http://andlupa.com/userfiles/file/76070469654.pdf
    • http://scottsdalehighbeavers1978.com/clients/80197/File/fiwaditikis.pdf
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/cbfe356a05ec539b630093c0be3ac97a/45196690924.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/ab9c651de94bfb7d12c3eaf2673d82dd/65606808637.pdf
    • https://klcmekatronik.com/ckfinder/userfiles/files/42104234467.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/6cb05a106f1e12f986f908cc4aaec1db/5576867569.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abd6677d381---lobetokubageroxuwu.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/6b6d9551e9f9e797062b50e10295ea3d/91394309372.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/70012714586061e36164b69cae662ea5/fukasizeramovonafiv.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/vb08g1o6ddr0ho27b2177bacgk/35185310807.pdf
    • http://alphasigmaoverseas.com/userfiles/file/fegogizamosekubet.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/e3b9e8d4bfc8c9897929158b63c61bc6/kebijolepexi.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160702e643fae6---46056870904.pdf
    • https://247hvac.ca/fabulous1/uploads/files/rolorakujajexuvezul.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc8f919e72---9529767181.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf30ebfd4d---66020439509.pdf
    • http://lightningriskassessment.com/ci/userfiles/files/mewolaxera.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/5088881b6db72bfe7ab6e83ed1533989/sapivez.pdf
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abbe669d636---sajevezelogas.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc49924d55---powavurusev.pdf
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16083b122daad5---13742699785.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080363daeb2d---wogepasowitud.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=diversified+gas+and+oil+share+price
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c777.bin
c9dd8f92395af02d4c3502c86d456a4880f8d756aa27bfd49dff0ff8282ea758
pdf-font-stream PDF embedded font (sfnt) at offset 0xC777 10868 bytes
font_01_sfnt_off0000e04f.bin
0087c1cc69c56ebd4d13bbf3ec550e0a73ebcb3fb742a8c2db27d59f33693178
pdf-font-stream PDF embedded font (sfnt) at offset 0xE04F 17244 bytes
font_02_sfnt_off00010d58.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D58 16792 bytes