Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34622357f858e9d…

MALICIOUS

PDF

69.9 KB Created: 2021-09-26 13:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d5aea68fe32c1134fb173e5d02a526a5 SHA-1: 8055f00ef4bf20205b3c61d2a34e666a702483dc SHA-256: f34622357f858e9d2b70637304e409f9fc91c669315cbd6e4baf2c9faf231d19
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it contains embedded JavaScript and functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The primary purpose appears to be redirecting users to malicious websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.sainteuphrasia.com/www/js/ckfinder/userfiles/files/34772205732.pdf In PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/161321c96991b9---87381822634.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/dd701a48f2cf2cfdf1d73972188f354c/4313154687.pdfIn PDF document text
    • http://sithome.com/upfiles/file/20210918025402.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614ddc691eee5---5869146775.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/80696354774.pdfIn PDF document text
    • https://ladangmimpi2.com/contents/files/tijapijit.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/nelagalo.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/xojazubevuraborowiza.pdfIn PDF document text
    • http://guanzhuli.com/userfiles/file/fajaf.pdfIn PDF document text
    • https://pypconsultores.mx/userfiles/file/leziniziriv.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/46894010597.pdfIn PDF document text
    • http://dream-mebel.com/pic/file/mexopumufalipasex.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/940726a30633dd201f34840808af19bc/10867298896.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c167b25f83---90126783516.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/derodixuxusilelesinitul.pdfIn PDF document text
    • http://atdawnwelift.com/userfiles/file/sekut.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/93924639756.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/53497745152.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614a3ff369be6---bokotivogafikebuwesej.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/kudedoxafapopevub.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/zeminujorosake.pdfIn PDF document text
    • https://mu3yc792xh-rl1.com/contents/files/82439188902.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/xowajorilijazesodopaz.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/83818281151.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/81206668950.pdfIn PDF document text
    • https://kaemsp.org/upload/editor/file/pimapavoluxug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=any+video+downloader+apk+for+pcPDF 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_off0000b348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB348 10688 bytes
SHA-256: de7eaff78588b89365f4e2c8b15664fa41f27cfd05c557e9221cca20ca051bcc
font_01_sfnt_off0000cbf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBF4 14472 bytes
SHA-256: 76f97d1b099191dba9ec26fefc0e947879834990e5ab3d3774aca51566e07a3b
font_02_sfnt_off0000f01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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