Malicious PDF — malware analysis report

Static analysis result for SHA-256 30fa61d919da4f0d…

MALICIOUS

PDF

74.8 KB Created: 2021-08-25 06:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cfa8630a11feef188d9226fc0a19e393 SHA-1: a3715dfe210f744b2144285ab4805689ca02add5 SHA-256: 30fa61d919da4f0d1665c2e9333527ecc1b39dcccf82424a1d9d2948c3bdc5d7
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised WordPress upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and numerous external links are consistent with a malicious PDF designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077c67d93e8b---newirotuwavibinoziwuleluv.pdf In PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/83453180143.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/92625435402.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/50298914954.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3be63a31a---kixelufu.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b50d50b38c3c51cd616a6acc7e478e94/71105898296.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f762d692783---poxukalezanolojamiwo.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/911c5ccd80e5626d9ba6fd3446258695/99551082512.pdfIn PDF document text
    • https://designmaster.in/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/10459777025.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/kamabawujediku.pdfIn PDF document text
    • http://lmleadmanagement.com/userfiles/files/82587075024.pdfIn PDF document text
    • http://boek.se/bilder_umeny/File/genexuvozaroroselowur.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/fopavadolidoxugezubu.pdfIn PDF document text
    • https://maximatrimony.com/ckfinder/userfiles/files/fejusobofewo.pdfIn PDF document text
    • http://mesterek.net/tmp/jelifutubitoxifewujip.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/lisafiril.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4fde792a2---vesorebuvulojamumuf.pdfIn PDF document text
    • http://princeverma.in/uploads/files/lulesupuxemitaki.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/975cb00af2d36cde6ec966a09d5889c7/1981153181.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/qg59aelmu7svaf5ojigkj9a7d1/jipavuloni.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa2fea14f6---52416674479.pdfIn PDF document text
    • https://nadamasristorante.it/file/kefosixabixeruwoned.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a41f94495da---87635278801.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=wat+is+the+wetherPDF 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_off0000c5ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5AD 10012 bytes
SHA-256: 17b1d7a22c3e3b96466d6a932fa0ab4d407876601afcc9521122f6a586007447
font_01_sfnt_off0000dc1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC1F 16240 bytes
SHA-256: a1312ae6e6ca6e34fe9df0734c30848b96477867ae8d9f15d77a46898b351286
font_02_sfnt_off00010560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10560 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1