Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee09f8758d1efca6…

MALICIOUS

PDF

67.3 KB Created: 2021-06-26 20:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: fa6d3113f0a6ae9543aa7db0ee36b059 SHA-1: 5e521e323d6ea855f44cf253568653f815a1a184 SHA-256: ee09f8758d1efca625e98efb6d81d9abed189eac1c4dd255b6f58a1e48a199d7
162 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and a large number of links pointing to compromised WordPress sites, suggesting it is designed to host and distribute malicious payloads. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is likely responsible for initiating the download or execution of a second-stage payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

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.
  • 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
  • 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://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/uc7ghoj0g29mo9as8q461c39un/nivojijidudimiwumexujasu.pdf In PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094882b1c056---juwosesopomevajaxujem.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0595b6659---jipadonapetodorosiwi.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16073ca8e03ee9---33390962893.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1a644764ca13c6da3b1bc78e0b098d30/lakupesibosimamixu.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160981c4ad8bac---53129674630.pdfIn PDF document text
    • https://egyptsuntours.com/userfiles/files/gijusubigu.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4824568a50---32397070060.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608679b5eb435---kapodezitevebusujadi.pdfIn PDF document text
    • http://yuhongzg.com/d/files/zomufosenopabekupu.pdfIn PDF document text
    • https://safrano.pl/userfiles/file/19873409902.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e1011b871---71061697502.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5ed4b588ad---zijave.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/18037853053.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/78bavtck6dm32anvpbo5h3qpi4/99364417669.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/95a7436069007af248f2f96b1ad9a8e3/vonefapozer.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cb49eaf2a8f---jajazufeniwegobazasepem.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cac53340cd5---93486729755.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093630947abf---feximiwibapizi.pdfIn PDF document text
    • http://assessmentinsight.com/ckfinder/userfiles/files/fivedafodubiweboletuz.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/97658030620.pdfIn PDF document text
    • http://birkhoffhi.com/userfiles/files/20665756366.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e8f8d1d00---basefurexakamata.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/f23655391a2d714f02684be420ad0c18/tidijiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=dr+driving+mod+bus+apk+download+freePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD85 11228 bytes
SHA-256: 0efdab9e9e3c8a787cff9e2c1894b524e70a7d8634e3a83f3851c8f86feffc0d

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