Malicious PDF — malware analysis report

Static analysis result for SHA-256 dae32181f5a344ef…

MALICIOUS

PDF

76.5 KB Created: 2021-06-30 13:36:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7f38c72ced815c1d76df22eb0fe97e8b SHA-1: d95eb0a63ee74a4cec03d682bd43de7cf498639c SHA-256: dae32181f5a344efccd61ca6f5f5b35a9f51c1e4122de401485fe6e749e3c85d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These sites, in turn, host further PDF files, suggesting a multi-stage attack designed to lead the user to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad31cdde6ec---fedakoxizi.pdf In PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/7a7d44b13f83133d0e29a2fd74500abb/wimemapujijujozabeluxaf.pdfIn PDF document text
    • http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/zobederuwodedagitij.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5023c449fe---5063718023.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/3cf5a66207720d5d66c3563186a35fc1/zupipofor.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e340422b6---45265452621.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/58cbf77cbbc79cf33029055c47764926/fekuwisevogetagoxumikomem.pdfIn PDF document text
    • https://qualitymattressfactory.com/admin/userfiles/file/45332794939.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/998baa628faca7006c02858d39309367/13717123746.pdfIn PDF document text
    • http://orchid-daikanyama.com/userfiles/file/mewunadilobutatemawugej.pdfIn PDF document text
    • https://www.axelendinggroup.com/wp-content/plugins/super-forms/uploads/php/files/1198ae767b5ff3eae878a368e233db6c/8031125142.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/79216073548.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/fibatox.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/7a177346dc0dfb3e49a57868b5a3dceb/bijavofuwalekiwagotarutaw.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/20622750015.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160737864a2f6e---daxarufo.pdfIn PDF document text
    • http://ridendo.cz/files/file/86721568366.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/22suraundh4evr1p1oets0m57i/54912221228.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a33d2a0ce6b---sajozezalo.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/kuwujilurizag.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/691a2d88b59feb764c41fe833f3b3bad/13069885965.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/fhd118cco4sqkk6lt30q1l2an9/tumidojewiliwamuragagu.pdfIn PDF document text
    • http://best-infosystems.com/userfiles/file/vupiw.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160888f1c356c3---62111396543.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609939e4011a3---nunuzexaladagawuzunesu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=hl+rubber+industries+sdn+bhdPDF 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_off0000c708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC708 17684 bytes
SHA-256: 9de657a1e0510225e6209faa13499ca3229beaf0c090e1ba07e8603ff8a9d50b
font_01_sfnt_off0000f57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D93 10296 bytes
SHA-256: edeb1b79fc2bf9aceaa2815385830c52b0fb974bcd757e00bd2bd5b1fa7185a3

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