Malicious PDF — malware analysis report

Static analysis result for SHA-256 7264f1db7bf9b81e…

MALICIOUS

PDF

116.2 KB Created: 2021-09-04 23:33:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c4fc887d7f2d64c65380f9ffa6955d58 SHA-1: 14c9e67317189eae9633f8fc129d1d30faa62170 SHA-256: 7264f1db7bf9b81e9929982636643284e0a3c20579d29aad065205e664607755
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristics indicate a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content or phish for information. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://oniceh.ru/uplcv?utm_term=iso+9001+version+2008+requirements+pdf PDF link annotation
    • https://selapro.com.au/application/third_party/ckfinder/userfiles/files/28157578031.pdfIn PDF document text
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/e23c1b5b0d3b2bf46364f3020ea33c10/guwugavemujiwuzi.pdfIn PDF document text
    • https://lawweb.info/mycms/admin/userfiles/file/67182591957.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf46619e58---83553321643.pdfIn PDF document text
    • http://sneedfamilyct.com/clients/44919/File/tefosagotikez.pdfIn PDF document text
    • http://garage-fuji.jp/js/upload/files/mifisifab.pdfIn PDF document text
    • http://www.s-prom.si/fileupload/file/jifosafemimomaji.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c62b58904---73767609221.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/81981756937.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/47dec80a584e34bde5641f0ac7162fa2/77911483079.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/65018496534.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/vomigojejujezemazuvom.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/00mt5ton98tm1unqq1uh5k0jq4/zigijamexatuginomufun.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9bec89a3a---79433477604.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/55338769359.pdfIn PDF document text
    • http://bkbflooringusa.com/userfile/abbey/file/bivumezexijujakisame.pdfIn PDF document text
    • https://protectname.xyz/whoisprivacy/userfiles/files/47649698680.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/285aaade38e55ef9edb0796ccf33c597/zumoxagozepodirijibu.pdfIn PDF document text
    • https://recrut.com/files/files/xakejuvirimukururitoxadab.pdfIn PDF document text
    • https://fuoriscena.eu/file/16257831818.pdfIn PDF document text
    • https://mimpiindah1.com/contents//files/gutiwugijexupubogifidojos.pdfIn PDF document text
    • http://unibox.lv/files/text/zovomen.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160df845652bfd---80275460805.pdfIn PDF document text
    • https://vannordenvastgoed.nl/userfiles/file/wetezabofurinizuvodivodej.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/pagamupaf.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0de35d3e5---7012815938.pdfIn PDF document text
    • 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_off00015eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EFF 18856 bytes
SHA-256: b6736c35fcfdeccc6085caba335c00e18469227012bee82fc4406ebdd299e4b8
font_01_sfnt_off00018fe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001a7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7F8 11384 bytes
SHA-256: 7d3e7b550c4acb02c54598d817cf4dad5a5374a4c55f1fc8bafcc9630acf8784

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