Malicious PDF — malware analysis report

Static analysis result for SHA-256 d217d8f30e4fdf82…

MALICIOUS

PDF

81.5 KB Created: 2021-09-22 11:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e6137016b53a94f60dabefa9a547ed96 SHA-1: 15421c43693eadad42935d1eaf4320e427a5be97 SHA-256: d217d8f30e4fdf8263e8d671780e154cd2a5219665f5acf17047c17e2f676f99
164 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or exploitation process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://tmkb.org.tr/ckfinder/userfiles/files/lekigafuzu.pdf In PDF document text
    • https://minjar.mebel18.com/uploads/files/tiselizevuf.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/38645981118.pdfIn PDF document text
    • http://meyanko.com/userfiles/file///7628073413.pdfIn PDF document text
    • http://circuitoinsulargc.com/documentos/file/forugozobokorenuwewusaw.pdfIn PDF document text
    • https://norservis.info/files/files/jolawimekoresiwefuki.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/bubowidaxosiruro.pdfIn PDF document text
    • http://skyrybupaslaugos.lt/uploads/files/biged.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140741c2a61b---kulixozovituwi.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614469bd6fc28---55376666166.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/161406a513a62d---80649352235.pdfIn PDF document text
    • https://tndvn.com/js/ckfinder/userfiles/files/pekitutipawepido.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/31559295854.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/41071509166.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/19440690331.pdfIn PDF document text
    • https://deitratech.com/userfiles/file/3390590078.pdfIn PDF document text
    • http://vizugy.hu/uploads/files/viwafu.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/fonuforijagazupigo.pdfIn PDF document text
    • http://www.cddfct.com/up_files/file/rosiru.pdfIn PDF document text
    • http://dieterheich.de/images/uploads/file/depupizasabowuzofudesig.pdfIn PDF document text
    • https://chsromania.managenet.ro/images/file/gevavufagapomemiwe.pdfIn PDF document text
    • http://tourhong.com/FileData/ckfinder/files/20210922_D0612192E0CD233B.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=advantages+of+ict+in+communicationPDF 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_off0000dae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE7 10820 bytes
SHA-256: 8d552f3ec416aa2825095f1ba9e5fe3004898792a23b19bec7949b1671eaebdf
font_01_sfnt_off0000f3c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BD6 17156 bytes
SHA-256: 8eede99227c7751873a413c142a3923e525a3ea97030dfceff0dd85e4df8f5da

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