Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e20d67658783c97…

MALICIOUS

PDF

84.4 KB Created: 2021-09-04 17:52:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b2a32c5dbe1604e4609d7a57727576d7 SHA-1: 32ee3f32e70e02df37a5a0674edd691814b4e3aa SHA-256: 9e20d67658783c97323752249352e374a49265edb55bef3e8267d13bd8ec11d9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains embedded JavaScript and numerous external URIs, many pointing to compromised websites or disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://queure.ru/uplcv?utm_term=kiran+antonyms+synonyms+book+pdf PDF link annotation
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/43171d42d5cf62767a11274eed03bfb7/28131956187.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/a814a0d45445cf9d8b723c33e3fe0385/86072869503.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/jinuxu.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/xajewivafita.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021042821520762.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e7c553a474---nezir.pdfIn PDF document text
    • https://projektovanje.info/userfiles/file/toxaviloda.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/mozozivemizamuvagazonub.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/1658b0fff0c270266fb491ef31986d7a/kabupigekafikapoxofoj.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021052801123273499.pdfIn PDF document text
    • http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/nivejofofopinimivuxug.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/fuvogerebamazewidapilera.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/rlurjcc7vhrc896c1mm3ddfh8v/mufofabosusurivupegen.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc4ec01d0e---260706277.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774363ac088---23841364066.pdfIn PDF document text
    • http://montazerangroup.com/uploader/file/73188372295.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/b6b6fa38ec5b3d115a21fda84cc226fd/92111354661.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16071d7ff590a4---firuvezufijurarinup.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e5687d6d2---87238213394.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871aaa6b6ff---lekojajepakepabenabaxezed.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607246d9c6532---rowawosisajigim.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/foviwapililukutufin.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/33894308605.pdfIn PDF document text
    • http://a-aqua.fr/ressource/site-image/files/99164432816.pdfIn PDF document text
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/pivedakofudabunaxeremupe.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_off0000ddd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5ED 10816 bytes
SHA-256: 6b606ccd54baee1a83f4174c84bbce9cf52c8e317ee26b9bcbca49afc1d7ae08
font_02_sfnt_off00010eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAA 20228 bytes
SHA-256: 4497f6bf258678583398eab153117c796e140ea9708fc80ce8e37c41a5ce1d2c

Open this report in the interactive analyzer, or submit your own file for analysis.