Malicious PDF — malware analysis report

Static analysis result for SHA-256 e58fea0010273dab…

MALICIOUS

PDF

88.5 KB Created: 2021-07-16 15:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 418e7fa59d68ccbc97189dd3e751dd12 SHA-1: d96c17a9a43a172b8b29034ebfffda635a1bd24e SHA-256: e58fea0010273dabbfc1c6c25dc6f73bddac33860043953877191ce638149ad7
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS uploads and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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://irlanc.ru/uplcv?utm_term=2b+mindset+lunch+recipes PDF link annotation
    • http://archerelectricsupply.com/userfiles/file/85608000427.pdfIn PDF document text
    • https://dalton-english.com/userfiles/file/vatuju.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/c11bc74280df40ac154a7abb99c6f705/gexiropap.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/5crv8s2jnpoc1mvbt28rjoqask/zexelo.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/riwezafote.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/lazexodozobefezazul.pdfIn PDF document text
    • http://papinchess.ru/userfiles/file/13221982417.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090e8812cd81---jesitebaf.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160b4442a938c2---gexetesotu.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2a63b9888---69204422327.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608828ad37f39---94816074641.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/271ocgt6eur3o8su3t2hfpp9u3/devuxefejuk.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/b79bab7fbb21a1dda164f703a13ab64b/24078400941.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c519b959c---66572993449.pdfIn PDF document text
    • http://cnex.cc/images/blog//file/koxosuluzinolaxuzutapipu.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ddf4043dc47---sujorurugigerenudevilijev.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/37c81f9f0f122bf527de3a9620112a67/87610805525.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/c830d71492791b3857363ad93434d5aa/misulojado.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d12fce2433---51944916836.pdfIn PDF document text
    • http://ilkyoukais.com/Images/Media/files/xovugunuluweveru.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/vavevagejasim.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/vidodixevijivuxil.pdfIn PDF document text
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/0a1a2f3fe1fcdacde667c17d7d6333f0/43636142355.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/xesotawaxesefi.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_off0000f7dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DC 17080 bytes
SHA-256: 44321dbfc47e41452796cc8bb624b0e2e0c6404bc7bd8220fdb8e13c75ef99f6
font_01_sfnt_off00012484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12484 10760 bytes
SHA-256: 1eb0aa997c26a2c91d307f4bdb514f458bd242fa4f193007cecdef05f32300f4
font_02_sfnt_off00013cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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