Malicious PDF — malware analysis report

Static analysis result for SHA-256 a060214442dd64f8…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 05:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: cb08bb68914d490396249f0ea9681dc2 SHA-1: 97f923b5d8295e065498e86c770fe59413f37fda SHA-256: a060214442dd64f87abcaba879cdb19c6cb9de318d2172291dc4598d3b9e9010
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV. It functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS platforms or disposable domains. The embedded URLs suggest an attempt to distribute further malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://japanbizkorea.com/userData/ebizro_board/file/xurovorupuloxadazoxim.pdf In PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/zebupatojifi.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/94696568654.pdfIn PDF document text
    • https://stichtingech.org/ckfinder/userfiles/files/52770498790.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/gilovewejifejafowifaxo.pdfIn PDF document text
    • http://lica-mpt.it/userfiles/files/xokovoxitire.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/gimajezewuxemodefesinuv.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/xupunobo.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a85825f8a---8701436268.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/wuvupegitolajonuve.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/7082379059.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161352350299ab---58978760927.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161301a998d152---18401474773.pdfIn PDF document text
    • https://srilangkapools.com/contents/files/83279517572.pdfIn PDF document text
    • http://mcap.cz/images/uploadedimages/file/pujuped.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/soratuxuta.pdfIn PDF document text
    • http://koutingchina.com/upload/files/28995022558.pdfIn PDF document text
    • http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24872183290.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/nawajulazatetajamu.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/2477752169.pdfIn PDF document text
    • http://familiegravesen.dk/userfiles/file/73020245214.pdfIn PDF document text
    • https://gmnavarra.es/ckeditor/files/9671756642.pdfIn PDF document text
    • http://bioaec.com/userfiles/files/dulinozubojezamofepadetub.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/92125961413.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=v+families+2+mod+apkPDF 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_off0000dfd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD5 10536 bytes
SHA-256: ca7c27e4cf8a9588506f9c53db18d5cc78d3b71965152484ef0ae8a5f7b146ee
font_01_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 17228 bytes
SHA-256: 56b380a627f0d349064b8423e8b8eb0762aa91a99fad9198e4116f2e71f218b7
font_02_sfnt_off00012429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12429 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1