Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce5fceeaea7994d…

MALICIOUS

PDF

90.1 KB Created: 2021-09-05 17:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3d45e634eda6066e3af70e9662317be9 SHA-1: 0bba42d96af0b0ca635dca57432afe295e1eb60f SHA-256: 6ce5fceeaea7994d834757e6f1ab506a5fdbcd8f43e1d6b52cd118c57e2e63cb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a link farm, with several pointing to compromised CMS upload directories and disposable hosting. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://fpole.ru/sadm_files/xunarakuxa.pdf In PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/nqa1bah0mk2jj3dr9ubh7cl68t/97466387366.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/f9812daf40d0d59202426d8abdfa9ba1/63922802729.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/90b5a3ec5d927044354b9cb453948e95/supimoxo.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/98474971074.pdfIn PDF document text
    • https://salwangurugram.com/files/xirufuvitivagogofaradi.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/25189302508.pdfIn PDF document text
    • https://www.nitdgp.ac.in/uploads/userfiles/files/lokotewo.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/nulogodi.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/a02f9a36ad3bdff6928ae84b2da5a01d/subuvixuzubugogoxepovixur.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/vemalizosuluzevilagapat.pdfIn PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/nuco7d17h71d0748olbat1sh1c/wakubilisibamewemiluxudu.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094bf7fca998---72973518669.pdfIn PDF document text
    • https://tangentemag.com/img/file/jedizajevubezenirurefoles.pdfIn PDF document text
    • https://tarzminder.com/resimler/files/pixamafigiki.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/rasupomekarevubez.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/juvopafez.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b1f95726a---66468788755.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jakegexibej.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bef09a8e5---rebux.pdfPDF link annotation
    • http://paramountswimwear.com/userfiles/files/55595631630.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/s6888i8k74cpdi3ronbqbse6su/38050855861.pdfIn PDF document text
    • https://observatoire-omic.org/documents/file/bejezeru.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/munujikomapumewidi.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/29hm2n9r53m8t18p2a7aq94j1d/xidebaxaf.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/18128706216.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbea6a0034---18503900932.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=budge+egyptian+hieroglyphic+dictionary+vol+1+pdfPDF 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_off0000f4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC0 11116 bytes
SHA-256: 23750c7a6ac54ac4edee4127779bf1da351c57ea5d401c2884989d90894e6574
font_02_sfnt_off00012685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12685 19884 bytes
SHA-256: df993ebd7fae53997613b863a67e72ea876cedc7aa7af37ebd3b264c6a6ab29a

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