Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3eede22cf9db005…

MALICIOUS

PDF

75.0 KB Created: 2021-09-07 14:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4dc8422bf9a3e0c242ce5e3b99c100d8 SHA-1: f43d2a22a59b691a17abf7b02b6581936820c079 SHA-256: e3eede22cf9db005c91d17fed14ff013397e1c10e33bec7948e6b86eb5d34093
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories and other potentially malicious sites. The embedded URLs suggest an attempt to redirect users to phishing or malware download pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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.
  • 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://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a4433513b03---bupawo.pdf In PDF document text
    • http://paolacaone.eu/userfiles/files/sejiwiluliluzawag.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa1644bd61c---67443257763.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e48d22a658---82641414764.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160827a41d159c---85445462029.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/fukewosubi.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/8rsd5kldab1fhqsbhe8ke6qfq4/98047737289.pdfIn PDF document text
    • https://resulgame.com/calisma2/files/uploads/jopim.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160725d054d6bc---wabap.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/82779729504.pdfIn PDF document text
    • http://www.thaiboat.net/image/upload/File/95305060326.pdfIn PDF document text
    • http://mlight.cz/archiv/file/minamizukevigalozusekil.pdfIn PDF document text
    • https://responsible-tourism-alliance.com/content_file/files/62376199604.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210516132053.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/70d2ac2332a1c1839506a01dc1471003/zifokuvusuvipureru.pdfIn PDF document text
    • https://zlato-eu.sk/upload/files/9628892499.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/tebetirujitamovasuforulov.pdfIn PDF document text
    • http://greece-ex.com/images/blog/file/94943185113.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/6757a0d9bcff9fa190bc3893a9efd127/5497892066.pdfIn PDF document text
    • https://marljivo.hr/UserFiles/files/9738701758.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdcb84d0db8---58660901784.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/11547346826.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/joparora.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/u0rtempebo94thjhm00vuakmi8/napivasif.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/wubegogogisodisoveroro.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/l18lpcpq208qn08ig4cc0o4406/48952615783.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=d%C3%A9finition+gestion+budg%C3%A9taire+cours+complet+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_off0000bb5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB5D 11356 bytes
SHA-256: 8351d6cba615f2c663cf9dd92ff870e8deb945a6390d9e910a9445516608ac8f
font_01_sfnt_off0000d565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD565 18316 bytes
SHA-256: d5db0363a93b99e4ba6febe91b63b8169c1b7535d7521e62b7264be65ca914f0
font_02_sfnt_off00010356.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10356 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1