Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcea7eafa013c00d…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 23:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ae67e1cce2c7145320b120f416b6e5d6 SHA-1: 570fba98ade64ee8ff7ac36ee168b87503fc8966 SHA-256: bcea7eafa013c00dc7dbd5a2c9640893fcc09cddbcd200788cd2f75091b374c3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, forming a link farm likely intended to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://huntic.ru/uplcv?utm_term=view+pdf+with+jquery PDF link annotation
    • http://grappin-annat-como.com/userfiles/grappin-annat-como.com/file/34230114149.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/17334443893.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609674a412e9e---genor.pdfIn PDF document text
    • http://hanilkwanla.com/uploads/files/dotoba.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/60668868551.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f919c1496---26403453336.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1610d7a46a5169---93690412125.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ca9eb0eb0---bipunimapu.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160a2290892f02---5523821987.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/3c960694790f90c3ae449131c899af28/gabokipusalonugakow.pdfIn PDF document text
    • https://www.geo-decouverte.com/ck/ckfinder/userfiles/files/tofug.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/6uhvedukpgrdu9joc8u56n8ibj/luguzipujirosot.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c68a3b94a7---jefisowaba.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/39648735658.pdfIn PDF document text
    • http://vpecargo.com/userfiles/file/pebukorajanowaf.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a076f0224b0---89135827304.pdfIn PDF document text
    • http://yangs-ns.com/ckfinder/userfiles/files/20210702095632.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/irblpgp3rb82fqlep2obife383/11845181903.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/pabonolenokigodud.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/cf4fb56304bee014cba9d6e2a712dbf3/gopufodofutukejovejok.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d048e0d618---dolitagafen.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/2848443743.pdfIn PDF document text
    • 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_off0000de3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3F 10540 bytes
SHA-256: 448a691fe115727b6209993327bf553f8c46ddff48b0ffe90217ac151b21374c
font_01_sfnt_off0000f63a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4C 19040 bytes
SHA-256: 03501ba7cbf17c9f6d74ff8d47871044917af42e0df8a9aa7a33abbcc738ca8d

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