Malicious PDF — malware analysis report

Static analysis result for SHA-256 94b6b05c38e96bef…

MALICIOUS

PDF

568.9 KB Created: 2021-06-12 04:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: afa0913b85d61b77bb33fa5f5098b1c9 SHA-1: c461a44bb2bb09a90c00e035eb7d2efe5da8e8f0 SHA-256: 94b6b05c38e96bef32551f02773310f46a59600d31d2f7d16108734269577ebc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains multiple external URLs, including one pointing to a compromised WordPress upload directory, suggesting it's designed to redirect users to malicious content or download further payloads. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8952

Heuristics 5

  • 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.
  • 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://irlanc.ru/uplcv?utm_term=ram+sita+ravan+amish PDF link annotation
    • http://golden-candies.ru/webroot/files/files/lefawezepinofagavutipazam.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/24/file/20210524_025211_179.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/726nj68ik88cob80r9sj8tqfv6/fanukijex.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68631eb6a---zasesuwuvil.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076db72cb5ad---bagulipobevaxelor.pdfIn PDF document text
    • http://industrialdevices.in/uploads/49235483505.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/puxiregenonivu.pdfIn PDF document text
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/160790f7635d8c---76342715960.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/10238399346.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/12386218472.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/ede1748328baed77f055dd00bf0d4ca9/zufavuga.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/30e85618e847c28761aeacb7ce5f788e/fezoralijof.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070046103401---72819038114.pdfIn PDF document text
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/bd1a51e1f9e178757eb87d72da29fcca/ferida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00088ece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88ECE 4520 bytes
SHA-256: 9101ac7debbfafc5f172e24650f2c585f4e400e40de41881e156e5c76671b7dc
font_01_sfnt_off00089de5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89DE5 11908 bytes
SHA-256: a79318dad5925e56665b4ed90d7eba3fb1f5ec5a769cf05c858dec17e91e97d3
font_02_sfnt_off0008c597.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C597 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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