Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb682cbb4bcd946…

MALICIOUS

PDF

117.4 KB Created: 2021-06-26 12:08:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 664a397badfa57b8d399e715e0786c39 SHA-1: 1bff9bc515326e957a6abd8283e629c99fb3cf7f SHA-256: ceb682cbb4bcd946977d4b7f5df36a02a3da9d3586b97a201a03d1066e5f1a9c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://reedxtrainternational.com/uploads/pages/file/14518967050.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc37b6819f7---98621006027.pdf
    • http://kath-kiga-bw.de/bilder/berichte/file/zeluwekurorejito.pdf
    • https://mosallaesf.ir/uploads/ck/files/wipefirababozux.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/8uevbr4orp7d4mrj98rsps5116/44962688380.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/a6275de7e16d7b6aff89da67b3ef9ded/dewafofuzujanodokud.pdf
    • http://fygl.net/uploads/file/162227407708.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/59804974251.pdf
    • http://abpaluso.com/upload/file/40581299413.pdf
    • http://alexandercdg.com/clients/36029/File/sozanub.pdf
    • https://vigiweb.cl/dinamicos/files/file/dezunoduwojefipugotariz.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/56jpalap7mgn09vpt3c866fg8n/bazunip.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9acbc676d8---vefagupox.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ca59f8568de---82079573476.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/97b0892c485aabba4b10404a1a302c6a/74597292560.pdf
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa20007ba0---surizepusawifelebuzotekut.pdf
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/abada52055bb6dfbb8af825921973848/xikiji.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/16073e3963e72c---zosujilabaxibok.pdf
    • http://agataklimowska.pl/userfiles/file/gaxorer.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607440c08e8cc---riketuxupezis.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/8725805e57504c01b74746ff589194ed/nuwopo.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608373485d0eb---19045360965.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/b3b69d1c7cdf3419f91515922e9a20cf/41179190665.pdf
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/99250b91fd74596fef4c2e0f7548d90c/wolipivipa.pdf
    • http://chipublichouse.com/ckfinder/userfiles/files/27145816127.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=2pac+and+janet+jackson
    • 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_off00016103.bin
9c514a4ca9177c64bb96c38d73e88fa3fdf51872b80a1c61788652ebc0e22827
pdf-font-stream PDF embedded font (sfnt) at offset 0x16103 10516 bytes
font_01_sfnt_off00017939.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17939 16792 bytes
font_02_sfnt_off0001914b.bin
9266d62eead5f626dee3eacfd2600904968cd753990791e8904eddbf70e371ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x1914B 21160 bytes