Malicious PDF — malware analysis report

Static analysis result for SHA-256 54493436e3014a65…

MALICIOUS

PDF

93.7 KB Created: 2021-08-07 19:15:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 10f7ea37a6af8aa5a4cff85dd4a354e5 SHA-1: 43b3ed4840e606af384ba89a7e094a1eb3fd5ffc SHA-256: 54493436e3014a65bc1606b448c914ad620c1c1ca1b03b0a36e8c4df43f38dac
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the structure and numerous links point towards a malicious document designed to redirect users to compromised websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://philabc.ru/uplcv?utm_term=instructions+for+emeril+lagasse+pressure+air+fryer PDF link annotation
    • http://geobigoni.it/userfiles/files/vivesumegifasa.pdfIn PDF document text
    • http://bruningfoundation.com/clients/9/99/99acc79c432c4c389b364f5b25189af3/File/90415843149.pdfIn PDF document text
    • http://ortetel.de/kunden/schurig/ckfinder/userfiles/files/posikavulijujobowo.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/77fb34ec76d39d33c264556cb84e8df8/gurasuwa.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/nr063tgiqbk69ouv719c9ebsnc/rerugixedujume.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/5ddfcd0304ab677245d1d082e1263f7b/sipadudelubikivu.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607024b640cd8---fivotuzejagojenuvexokar.pdfIn PDF document text
    • http://designbeginnings.com/upload/file/8240620627.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/99788699670.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/camei4blbs93fi631fpvi8o014/55120920477.pdfIn PDF document text
    • http://x-site.by/upload/editor/files/mojisatuzeguz.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/86501733077.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/kerudupikilisulavilag.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ce11906b4---56176212348.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/45121961920.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16099fd5b0e0f4---foresetebivenexek.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/3635cf0806cbb655da8da0aa742f03c9/vubesazofadawu.pdfIn PDF document text
    • http://richfield1962.com/clients/4/47/47516dc9824f3897220912ef171c404f/File/74404146486.pdfIn PDF document text
    • http://webinaris.blog/ckfinder/userfiles/publics/files/34761504917.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/4423b873fe214632115c851eadff4ed1/25321244422.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a177be8572b---xopilofanetuk.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/sl9845os4rhtqkr2s6glf2hrc6/suzave.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/863caf9acffd24c029590c6b83fb2260/pewinumixelirekax.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608202c32919d---tuzekafatibezal.pdfPDF link annotation
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/070e12c81819f7d1eb8b35978a5e0bb2/daravanijitofu.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_off0001023b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A52 10988 bytes
SHA-256: 8abb567908ca2ddeefac505348c42205fd5ddc04bf5258a7247069e28e27077e
font_02_sfnt_off000133de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DE 18840 bytes
SHA-256: 8861c2a75505bcd0665696a4bbda176145fbd07e9a024283c5c02dbe03652b9d

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