Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e2c97344cfae60…

MALICIOUS

PDF

82.6 KB Created: 2021-09-21 08:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 66f68f423274176a2c885c583e97266f SHA-1: 7a773d090630016bae98f647c67d8f63545d89bd SHA-256: e1e2c97344cfae601b0affa3ca9046985aeb0be487342a68406e10739056b40a
164 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. Heuristics indicate the PDF functions as a link farm, pointing to numerous URLs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://gtlmarinefuel.com/userfiles/file/66956164938.pdf In PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/vovologukanometegumopowe.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/guxosatosenuwev.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/84996778950.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/24997996205.pdfIn PDF document text
    • http://viquadro.com/userfiles/files/62016352852.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/161493a7678089---90787555995.pdfIn PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/bewazodowobar.pdfIn PDF document text
    • https://exam11.menapoint.com/app/webroot/upload/files/siladi.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/49874829776.pdfIn PDF document text
    • http://www.bc-arman.kz/ckfinder/userfiles/files/delorozobekexew.pdfIn PDF document text
    • https://actorconseil.com/files/file/wenup.pdfIn PDF document text
    • http://www.cda.org.hk/ckfinder/userfiles/files/vojawawazigirinibija.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-9-18/20210918041502358629.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/71358080448.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/3afbd57c91023dde4ae9b08373114661/42721380784.pdfIn PDF document text
    • https://yasacompany.com/upload/files/pitudutexomumiwedojotirib.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/zisel.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/sevarolufezova.pdfIn PDF document text
    • https://computerzone.pk/file/pagijowabobolepolibupogum.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/161405bd106f62---13754466540.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/69648868533.pdfIn PDF document text
    • https://mcq.bmtinhoc.vn/InteriorWeb/images/images_news/files/gobotidosojogukijokose.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=fnaf+free+no+download+unblockedPDF 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_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 17380 bytes
SHA-256: 74b25dc7d06b119c3cb6ac2b645531685c331fdd51ece260ce08832db7e78e2d
font_01_sfnt_off00010c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6D 10508 bytes
SHA-256: 8405eac92f82747ee673494a1dc291b264aa652db54b16f5ef2811d12f1330fb
font_02_sfnt_off00012473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12473 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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