Malicious PDF — malware analysis report

Static analysis result for SHA-256 2998978dbdbf1bf2…

MALICIOUS

PDF

69.9 KB Created: 2021-09-06 21:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2e4cdcb0c212acf920dbceeb65e6d88c SHA-1: be620a675108fc9ec7d7e85d801ae7accae82de3 SHA-256: 2998978dbdbf1bf2771da1a7a537b00279b8ef3f77c4e771627d02582cb05308
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The document also features a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/8174abd63b2ea4cfc6b9ca0d54a15507/96698326038.pdf In PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9b4eb4fb7---16573160851.pdfIn PDF document text
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/6hgqnsig03kios4o1c599kn8hp/87095975289.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/vulolakolusorujasobunak.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb793ec2ac7---wiritubi.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-11/20210511164329928086.pdfIn PDF document text
    • http://iseveranscopy.com/upload/editor/file/5539935503.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/50b10b35fb529889fb39c37bb4b9c8c2/2909253574.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16093a1695ad9f---zimepizobadefap.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d7822d22c---15067107917.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16125ca5dc361f---78549593173.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c28506d821d---97225626730.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/23n7e42r781uamjets0s5dr5cr/wuwivaremerutevewixomobol.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/74095046827.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16206186508863.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/67198527865.pdfIn PDF document text
    • https://unicorn.mn/js/ckfinder/userfiles/files/javutatuvelukusunovukijov.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6cc382dfdc---fiditupopamosukopotiriti.pdfIn PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/jitakiwivopupemufi.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/e9270265c1079ed612e2c92e10de05df/62054418873.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/6e11013hktig4jca19im88oip3/xenaxitarizokosodega.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/jomove.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607862fae14de---89574530676.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=leniency+program+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_off0000b3e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E4 10724 bytes
SHA-256: 69d5b7813b715f79d882ad6ae8c7e8d1a3091c72c319749ea5360f6089f0a44a
font_01_sfnt_off0000cc45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 15056 bytes
SHA-256: 3a4971cfc48cada11bf261c8a2eb4cb29daf01931f2c665c9c438393c9cec35d

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