Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbae9735b4cf25cb…

MALICIOUS

PDF

83.4 KB Created: 2021-09-03 05:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: bcd169f010c8fab831b70190744d895b SHA-1: 0b38bacad0a682a8c7efce422b8f17349495ff9f SHA-256: fbae9735b4cf25cb9a7ce6c8a0ab52a66ad0fc3a54b37d2cf953fc0596d82b15
164 Risk Score

Malware Insights

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

This PDF contains embedded JavaScript and numerous external URIs pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation of PDF vulnerabilities to redirect the user. The presence of embedded JavaScript points to T1059.007, and the overall nature suggests T1566.001 for initial access and T1203 for exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=plant+breeding+and+genetics+pdf+agrimoon PDF link annotation
    • http://aexpress.lv/index/images/up/file/4379981536.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/982650h99rf51emt7nflb61li0/puwoliginaxidotod.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074012b975bf---89729682961.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/683dfa93fb45353c78322a2562025fa8/38904002740.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/6532499493.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/ce57c4b702e2343ec04f96cc69cd981a/66674429325.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fe96c1557cc---gifojebum.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/eb504fdbb24d14532294afaf9ab6e411/96214772316.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/vigode.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6f224c78b---wuwatipotapixixegapimagur.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/m15666qptuc89e5dr3902t1dnm/58124247951.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2c1cd486a---foguvobugozexexuv.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb0a6255ee7---ruvuvudewawok.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/figipavenowiselivevir.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609585c9c7d8b---68059055946.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/2a4j6gbrd834ac69dhm9onal96/68279529449.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1625183739.pdfIn PDF document text
    • http://vuatoyen.com/uploads/userfiles/file/tisow.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/fidizijire.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9e5dbec56e---soselobuvefisiligarima.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/90942031857.pdfIn PDF document text
    • 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_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EE 11104 bytes
SHA-256: 2cdb1eda408ba403e4b0fd96c821a5cf7f0963a998602e3dd0a574f80dce365c
font_02_sfnt_off00011267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 17352 bytes
SHA-256: 8ca41cf311a2f2e5420195fbbed6fb0ef1b2df8fdbf64e5aeddb7820524e514a

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