Malicious PDF — malware analysis report

Static analysis result for SHA-256 32557b9c8d2a2981…

MALICIOUS

PDF

80.6 KB Created: 2021-07-04 01:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 62489fb75d6fcafa074faeaed4158789 SHA-1: 8e31e31ae1db6ec8429d1d9ba0c2a764d5887cda SHA-256: 32557b9c8d2a2981b30be126752f7c2877fec4f9be61c7773bb148c05324c948
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. The presence of numerous URLs, many pointing to potentially malicious content, strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://coiffurenais.com/userfiles/file/97141325377.pdf In PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941a4d23599---savosubotarakasazibazodem.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/mejizivufuj.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/punizapekemawozifix.pdfIn PDF document text
    • http://pcmcpropertyblog.com/wp-content/plugins/super-forms/uploads/php/files/3bd8c02343d986ff71b39ee729d6785e/borunudetabefisupuziwebe.pdfIn PDF document text
    • http://lyonsmcafeereunion.com/clients/a/ab/ab8eb7fa8d7cf94b91f67e7e346c80ed/File/2693779044.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/jafojeduziv.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b01f197ea81---ravekezizesenizumiju.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7b0ae78184---laleta.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/lovarojogijezeg.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cf7ac954b---47012962430.pdfIn PDF document text
    • http://medi-sen.com/files/files/dibevosoxupuxuwirifa.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607521dec65e1---butikola.pdfIn PDF document text
    • http://jcbcharpentebois.com/ressource/site-image/files/35946713911.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/45945942533.pdfIn PDF document text
    • https://manenshop.com/upload/files/zerolomenajizilinudolidev.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/98749025299.pdfIn PDF document text
    • https://bd-sokolovska.eu/userfiles/file/54506053436.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/16cce02d97f723e5cf0a1d98f3a49ff3/18867635931.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089917e4319d---rozevex.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/6l7dli1hnq6n15ijlsrlng95np/pikeguzarovamuw.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160835d6ae7143---13541002163.pdfIn PDF document text
    • https://calmoinc.com/upload/editor/file/pugozuxakazi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=division+rivals+fifa+21+pointsPDF 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_off0000d824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD824 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF036 17148 bytes
SHA-256: 103fbd153ad56e53eeace0cbe8814f4ecb853c1dc8d41f893d85ffc21686ace3
font_02_sfnt_off00011d3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D3D 10460 bytes
SHA-256: c6b6abbb1f628e00ed34d0f10d1674e2b3df470c1d875f9ddc6d508c50ddd2fe

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