Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dd872ebcefcd3c8…

MALICIOUS

PDF

78.7 KB Created: 2021-08-22 10:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c92d82b4cded26370a345f02c09fb9f3 SHA-1: 6c35cd97ff60b6f7cdfaa062181425345d52e5f2 SHA-256: 7dd872ebcefcd3c8c5cdaa903db02f00e3a144f888e2c0f96c16083ea7fb88ff
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised WordPress sites. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/f1a7e90f118bc253bf54967ce8c17cd7/lokijumowag.pdf In PDF document text
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/63668696050.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a17b9e1ce27---15275875205.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/32620160419.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/cd043b25d3e2733d400ee1c355fa6f04/gisivipuruzotepifiz.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/befevalomobagirifuxabeko.pdfIn PDF document text
    • http://challendor.com/fckeditor/upload/file/32047836647.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaaa56571e---82467594621.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/38b2c2e4889e07b01294c376fc6987e4/takupegomitexukevolabotu.pdfIn PDF document text
    • https://rolcsi-bau.hu/userfiles/files/bedebatonitofama.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/ba8c280b720ab81a3e7ff1ed3f16dd8e/wivujamorejofefiwumezor.pdfIn PDF document text
    • http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719a2f74765---sebepupenebif.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/jf8s9i2vu00oep5ic3sepalen3/32485260821.pdfIn PDF document text
    • http://wabasnb.com/files/fckeditor/file/207861809060a95b088a5e6.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/4654b78084969add9091ae2477773e82/25319204988.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3314499aa4---97004491841.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607eadc3bddaf---65494067095.pdfIn PDF document text
    • https://alajuusa.ee/media/contents/file/66036412361.pdfIn PDF document text
    • http://mirai-kankyo.com/userfiles/files/64024992074.pdfIn PDF document text
    • https://lamthong-marchph.com/piceditor/file/zivenefawokusudakegatu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=diccionario+armando+hoyos+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB734 17144 bytes
SHA-256: 70ebd2f5e6ae33c53e161848ec4925e534439f98dd5a94a832e5b0c3b0f46c24
font_01_sfnt_off0000d080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD080 17028 bytes
SHA-256: 3b3c67480808f4538a0ac99cd3f5f4975c42d8c18cc9763080eb38c5a37b741a
font_02_sfnt_off0000fccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 10724 bytes
SHA-256: 82f1f6896777701a4c64f7763f354b659aefc6150ae430a55d031d2e8163d431
font_03_sfnt_off00011537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11537 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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