Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ea540d9e98ddef0…

MALICIOUS

PDF

91.4 KB Created: 2021-07-13 19:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 10be19b1268bc931f3e569ef34a23030 SHA-1: 65988fe766f5b61c57f78ad7e097d8937c55d003 SHA-256: 4ea540d9e98ddef00a2cbbd5b755e13500b51c8b7e276539edaa9343bcfc4ad4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress sites, a common lure for phishing or malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a technique used to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607074d47615e---nikuvixesodudolamig.pdf In PDF document text
    • http://svaz-podnikani.cz/files/file/zuvalunuf.pdfIn PDF document text
    • http://studiomuraca.eu/userfiles/files/soguxiwapewe.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/nigelonixezu.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9ed22b337---33744304133.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/q68hpckqbfqiktdetrjsn2shb4/91839288531.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20409b51cc---79112168615.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/96e224317683f6e6eb19ef0430062693/depuzufejugawenupopiwari.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/jibilotolu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a3ef6f4db---43959436688.pdfIn PDF document text
    • https://detectiveoffice.net/userfiles/file/jitefugixilajuvavule.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d39764a198d---46962153617.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/9d03e58dc0acb27c976375ded2c5875a/66347717757.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed124ff3d1a---vulejoku.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/67113245542.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/novizipuravesekeginokidip.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1186e2933---64782166810.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/9007720229.pdfIn PDF document text
    • https://conberraquera.com/aym_image/files/40465611381.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/41551626897.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609780846a686---safavef.pdfIn PDF document text
    • http://tunglamgarden.com/images/fck/file/2844134121.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/4eb32b8d28dc90bd169963c374e6446c/63737423252.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8dfe76a068ff5ad97dc376f93c377246/18399886401.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/18433306608.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=gopro+hero3+silver+edition+user+manualPDF 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_off0000fccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114DF 19560 bytes
SHA-256: c8a1855ea2fc2a5ce0272a1e8e5df0daee44189c7c34b396bbdbeb261e14bf92
font_02_sfnt_off000146d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146D7 11032 bytes
SHA-256: 3c538916c261d3773f7bb84998890fa336b7eccb7b9f4ae22392d6a5f8122a40

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