Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bab3ea5712bb0e5…

MALICIOUS

PDF

129.6 KB Created: 2021-06-23 11:08:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 493dd5f59644833f7071061020806f8d SHA-1: a1caa3ab7c47982ec9650f7e6e9c75bb110b6d18 SHA-256: 7bab3ea5712bb0e5155c70a6469e2e8b7893553e75dcf255b9376748aefa8f7b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS upload directories, indicating a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a phishing or scam campaign designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607906b72c365---tumaroxijilewav.pdf In PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/ea221501d805bfd8ab52338758a5b73a/71460186857.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/14af1c10bef02c478d355c98742f13b1/42939802343.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a49b5c988---wotefaneseku.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/4c86e370cf471dce06a895042b113e04/41051562696.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/bnshi1o6tsmuj6gfvi0iqp4g2e/46383410313.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c0c49b859---direxub.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/70cb8a6ab96a7947c6ab29c261415bda/rikujutilolokebevizikido.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/zakoxaluvawow.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc433e92ad---foliluxupefatib.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b914608776---bulitoze.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/52412909718.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/63759757582.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/7bf5jst7rmks2n6cm1e2efkfj0/rorik.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/wapobakajutitekululij.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae8d854279---fenodibon.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a67e02b2169---19785159688.pdfIn PDF document text
    • http://teerosy.com/ipp/images/uploads/files/lejajux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=sutra+of+perfect+enlightenment+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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019d17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D17 11292 bytes
SHA-256: 8489f413940703b5be86695c1da828cd5c47676f6f2ac9ee5219d2afefed32a0
font_01_sfnt_off0001c123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C123 5496 bytes
SHA-256: c38e007c1a7d801000abacd1f937f20e1bbca974031e5dda364143a9018cfdc3
font_02_sfnt_off0001d3a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D3A3 11496 bytes
SHA-256: 710f8c28dd42d9d79a22d7142daf171bbd19cd4069f70ec02664d5de1cf7e63b

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