Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eb66bd1bcd63542…

MALICIOUS

PDF

77.7 KB Created: 2021-07-22 23:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 44e62c2979b1eae30c2ea4f46367306e SHA-1: e10f32975c74ab5c8b3bceaed12f8d45a081d6c0 SHA-256: 9eb66bd1bcd635423bc520abd383ab2842e1f3477e5bd3b7233d195d4feadfd3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://aulacvn.com/upload/fck/file/7410386344.pdf In PDF document text
    • http://phsclassof1970.com/clients/875774/File/pawofurorefavujize.pdfIn PDF document text
    • http://okwmd.com/upload/fckeditor/file/72908176594.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e6561a1d6---55683645691.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/535c5f357c96101132e7e5464e446571/xozosumasajepe.pdfIn PDF document text
    • https://arerp.kr/data/file///pedurawikipilalorog.pdfIn PDF document text
    • http://mobilenmr.com/files/files/peburuwo.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ruvmv6tr790mjhhab5oo1c2upd/bisanalowamekezixifigog.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070c6710683e---78991947201.pdfIn PDF document text
    • https://dietacud.eu/upload/file/24560298867.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/74907295325.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a82972a297b---41647366305.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/3bf0185abdad4f4adbdcbd6fded4b362/57536548589.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607950cfd850a---59438085273.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e7438567f---50149739197.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718fc522316---womufolofigab.pdfIn PDF document text
    • https://empresa-venta.hr/files/rusujugalifarofitovozado.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/285719ed4b27b6affff7beda02b2467f/49499048998.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021050101342045.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/b00621dcf58957ac2496aa1cf87aa9ea/vilamoxe.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/sotojofidujesodegipuni.pdfIn PDF document text
    • https://www.m2asolutions.com/wp-content/plugins/super-forms/uploads/php/files/fbdb4be60c583ff1ab6678a412da1976/ripikeburit.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/75073498284.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/74697543771.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=arial+rounded+mt+bold+freePDF 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_off0000ccb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCB1 10568 bytes
SHA-256: 4e84392fe2494db679084cb57dc64f39a4ab4267d6484ebfc76d1dd8ba1253e1
font_01_sfnt_off0000e4c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C1 16936 bytes
SHA-256: 111b899b1ed4d9dc734206139222990e1fb6f865a582aa912c82c8cc56fba308
font_02_sfnt_off00010ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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