Malicious PDF — malware analysis report

Static analysis result for SHA-256 74eea769516b4d22…

MALICIOUS

PDF

92.1 KB Created: 2021-09-06 01:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: b14ddd986006c136c67de2e4278a6889 SHA-1: 3896f27db59e580d6d81b5127a40b787f9ebb116 SHA-256: 74eea769516b4d22ec91f1873f0e5670a72e571189f6d0488370fbaa755c4020
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://cructi.ru/uplcv?utm_term=eragon+4+pdf+chomikuj PDF link annotation
    • https://bodykneadstherapy.com.au/ckfinder/userfiles/files/dipexuxazadujefokozux.pdfIn PDF document text
    • https://turbooto.vn/upload/files/86220538889.pdfIn PDF document text
    • http://hotelbellevuepalermo.com/userfiles/files/sirafideke.pdfIn PDF document text
    • http://irs-messtechnik.at/upload/zogukezupugazilikolef.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16109733575902---fiwajovezikanez.pdfIn PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/goxowubabituxafuwafozirap.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf6c1479966---63018716791.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210725213724_hmckg0.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/b80151cacd41d767110aea0bec181319/dixusomiwabogi.pdfIn PDF document text
    • http://thegioidahoacuong.com/uploads/image/files/48029596279.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/10297611453.pdfIn PDF document text
    • https://babetravelling.com/ckfinder/userfiles2/files/sewufojagiritetobixuregil.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f53ff05d1bb---85269823876.pdfIn PDF document text
    • http://solee56.com/ckfinder/userfiles/files/meladufodu.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/r11jmp2llpog6umihhnimchn2d/11257466997.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/59792224010.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/wubep.pdfIn PDF document text
    • https://bearings.vn/images/ckeditor/files/tuzoroton.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa43bee1601---95937047171.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/u76n4tcrfmajus4td5fvrpuj90/jarifutimirefetanatofubak.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d19952324f7---vamonitoxunodubajepijo.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/593faf96a63e5497eeabb6df7e13835b/36024697092.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/g6udq5famrotm751cf12slpr4m/94603860942.pdfIn PDF document text
    • https://ecotranslation.ca/upload/editor/file/wurumibitogaketeni.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_off0000ff83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 11004 bytes
SHA-256: 94ec5f5008f11bcdef0672745ecf11197a53e5cf0e95e0d6d613f85840f900c6
font_01_sfnt_off00011899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11899 19576 bytes
SHA-256: 44bd6c8a3895791db7a9084ed2608dfeda604b7daba60ae7d3566f737ebf5144
font_02_sfnt_off00014b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1