Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a5d801030fa039…

MALICIOUS

PDF

83.9 KB Created: 2021-06-29 13:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73aa5464a038f95e1f3df86a6caeeb17 SHA-1: 042a008bf5a04405affbeb0b7ee16caa3ce57c6a SHA-256: 00a5d801030fa039f9b62a8ca6b19d57d96f459ee688f18fb18cefc71c2c1561
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs and link farms pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the nature of the heuristics indicate that the document is likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/uplcv?utm_term=variable+frequency+drives+pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a804e9cb1fa---26698394336.pdf
    • http://ibtaker.ps/userfiles/file/73285687119.pdf
    • http://chocoenglish.com/_UploadFile/Images/file/xitivijekupizepadik.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/526cd3400e33d7fe4c9c0f9c4ed161f4/71710079462.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081450b0bd09---sugadatisu.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093d067ae6a8---levajitasofovasuso.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/ngeahafq212t5jmfnmtddqoo62/litikemixuwagudu.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/bkjka3iqudap637h6grrnugvu3/wivuzikakofiv.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf3a87e2ec2---vatijosenotamanawulajobu.pdf
    • https://meganimal.pt/site/upload/file/89557317980.pdf
    • https://www.jedeminute.de/wp-content/plugins/super-forms/uploads/php/files/he341jcmpqa5ehq73lt62age2f/korudawesumugibovezu.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160834605e90be---70620118701.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/sl71enssedcecavb7nmsppeib6/40303378755.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16077bc2138f49---mimep.pdf
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608a81602db40---61117922851.pdf
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/9da145c5593a6f1f5fb3525d4d37bc28/rigamafupumusitofupavix.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c215964197f---jafirunobewezawofitak.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/273a20f5013d6230be272f7dce41a31f/39477320112.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b92f12b387b---21567944844.pdf
    • http://sarljarry.fr/userfiles/file/vedawavopilisudegoni.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a39a4036fd4---7498972167.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075e105ecb64---38086731530.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e63f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE63F 16792 bytes
font_01_sfnt_off0000fe56.bin
5708674aad0cc10766ca72348d8c2948cb4327c35ad94a81bb11912a1760d1b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE56 10928 bytes
font_02_sfnt_off00011758.bin
951cf1b8d9ad889cd750578fc416209cdf331447695f5d3666396f4463fcb7c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11758 16624 bytes

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