Malicious PDF — malware analysis report

Static analysis result for SHA-256 07eb18009700c171…

MALICIOUS

PDF

83.2 KB Created: 2021-09-04 05:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c9b180841711dcd548e9f6a2016a9115 SHA-1: 5d4418e2da94be0fb9fe0a52f265db4ea407ea3e SHA-256: 07eb18009700c171d57b9e1e44b99726266e333d7f49ff2e47d945769a7b9481
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is structured as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://rrbrentacars.com/files/others/46554002359.pdf In PDF document text
    • http://cf-solutions.org/app/webroot/fckeditor/editor/filemanager/connectors/php/imgmedia/90855911952.pdfIn PDF document text
    • http://mesterek.net/tmp/dinolosopeju.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f5509c9e5---dobipilorumedoxunenuvana.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/6c43ff0855d22e9aa74379594a5c2e9f/daralipewalu.pdfIn PDF document text
    • https://alamansyria.com/userfiles/file/40276497280.pdfIn PDF document text
    • http://ligneus.hu/upload/file/godukubirebakobinunonen.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/79598673980.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/43239854541.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/af518154db68a04a8bc2942bb81ec596/zoduruzovonobudemekekamed.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dba910670b---bosajurisagazedi.pdfIn PDF document text
    • http://mobitransjogja.com/files/tarofusetixikawosaniwuvan.pdfIn PDF document text
    • http://reichspfarrer.sk/file/faluzobabezewenizi.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/vumifofenigamux.pdfIn PDF document text
    • http://imbirimbir.ru/files/87210141967.pdfIn PDF document text
    • http://damvua.com/damvua/public/images/files/5761771626.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/91360968217.pdfIn PDF document text
    • https://burgas-remonti.com/userfiles/file/vuzexivexinu.pdfIn PDF document text
    • https://biblioteka-koneck.pl/ckfinder/userfiles/files/29923641382.pdfIn PDF document text
    • http://pokemom2.com/uploads/files/16763001754.pdfIn PDF document text
    • https://superchills.com/userfiles/file/45539283141.pdfIn PDF document text
    • https://artlabjo.com/userfiles/file/guneletedavalerabuwesoka.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2efd98ca1e---gedipu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=space+and+learning+herman+hertzberger+pdfPDF 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_off0000dcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 18888 bytes
SHA-256: e79f7093951aa930c5df958ca7dba792a00589bd69e1906357ba4b287c11f7e5
font_01_sfnt_off00010dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD5 11052 bytes
SHA-256: 2a91acf589242cd91f0f818cd88d226e0eb780d706f836fe95889ae68977501c
font_02_sfnt_off000126f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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