Malicious PDF — malware analysis report

Static analysis result for SHA-256 56dbf5c867dc43ef…

MALICIOUS

PDF

69.9 KB Created: 2021-09-07 20:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 27fcbd269fc4a81812136e71e7a0c305 SHA-1: ad49fb486034c67a4426d8e97ce513ab059b3c6d SHA-256: 56dbf5c867dc43efcce18dfd04a26d07c222766244b20d94294d173a29a8f240
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 WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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 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://lyna-garage.com/htdocs/cljr/data/files/68430786590.pdf In PDF document text
    • http://canxetaidientu.com/images/file/saxidakuzexebojijig.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/m5ri6ctmh3f1gsf8d7939a5asl/favosupewogelomixuruji.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/32566199532.pdfIn PDF document text
    • http://geasit.it/userfiles/files/329867508.pdfIn PDF document text
    • http://bptramptour.pl/files/file/duwegelalewor.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3713af9b9---37732177648.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fcdad08101b---10515312594.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/ralofazaxuk.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/zidikemuguzesonota.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed351be88c---guzirikivixube.pdfIn PDF document text
    • https://briljant-maleri.se/UserFiles/files/wegakefevavofafijiw.pdfIn PDF document text
    • http://canadanur.com/resimler/files/vejonopajudirupudad.pdfIn PDF document text
    • http://adamslakeband.org/userfiles/file/60707189811.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/l13bsoorolnh9c67fibnrcq3h1/52618621473.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612beb62b365c---jikobifizaxetuxuxepupis.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/vumorod.pdfIn PDF document text
    • http://agierresrl.it/userfiles/files/9810646215.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b68d4217c---mutitazozada.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/84578622849.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/lofamuxotezavafinidajevi.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/xokovux.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/10405828909.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/rbfndh8l9fe4o52is1kq6bpnf4/felitidudux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=decode+flatedecode+pdf+stream+to+plain+text+onlinePDF 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_off0000b417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB417 14580 bytes
SHA-256: 6d5444d7910a55ec4e883609a094eee2572976eefced14434f591249e888c1b4
font_01_sfnt_off0000d85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85E 10884 bytes
SHA-256: 3db1238e107e3486c6217ab3a76601cc7e5447fed87a892ccca361e6e47000ec
font_02_sfnt_off0000f18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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