Malicious PDF — malware analysis report

Static analysis result for SHA-256 108ec706281438a4…

MALICIOUS

PDF

89.8 KB Created: 2021-07-22 22:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 8c06986a58ea975de993c8ff049d3573 SHA-1: 05a008f47130b469be84ce5b339221562af7f7c8 SHA-256: 108ec706281438a498b7b9e48668cd542dff79ebee9ae29e970ee7927a19ee4b
184 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains numerous links to external PDFs hosted on compromised websites and disposable domains, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and URI heuristics indicate a phishing attack pattern, likely involving the delivery of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://tenekedjieva.com/uploads/file/lefivetogudov.pdf In PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a95cddcd40---wulureze.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/61149973105.pdfIn PDF document text
    • http://emeat.ru/var/files/rikisejewewenisatabi.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/4e80c1076665b9ab17593c1b7ab726c9/taxunusetiripasidov.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1606c917fb37fb---62605959992.pdfPDF link annotation
    • http://caratow.eu/userfiles/file/xuxebab.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/000d833ac7337f9851ecdf6a80ce2d4f/bakonofon.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/hs6lua2teugk7q9mdma2voqft5/68823368895.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad6fd2e3702---97728746578.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/53eef8120c25701752f93579a9c5f475/nupakam.pdfIn PDF document text
    • http://rosg.net/sa_upload/userfiles/file/20210722061434.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f97460c6bb9---36370826774.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608a8e01192f6---37345120836.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/5910405478.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/86a1adda3ade4a3200c9d07c8e2b02c1/pewup.pdfIn PDF document text
    • https://amatnieks.lv/pictures/image/widakelakazebazu.pdfIn PDF document text
    • http://karthikeyanjayaram.com/userfiles/file/45030115501.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/e6eea5e138f9c56f6cf5aeb664ab112b/dunitojowoz.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8c192dc616---93570472297.pdfIn PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa74570b97---raruwoxulubamonagonutazen.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/3eduq37udrbc9aq05c4k9oqu60/49555403328.pdfIn PDF document text
    • http://stasta.com/userfiles/file/19620462945.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/xibenumazirojofe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=made+in+abyss+art+book+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_off0000f537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF537 19972 bytes
SHA-256: 7990cb3f851c97f3492255d92415426c7c501a990737162399f683fe43586d3e
font_01_sfnt_off00012803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12803 10784 bytes
SHA-256: 13501376d6762bd83e96f55981ddd2e6da4767d7c67a3059b083d7c96d1bb1ae
font_02_sfnt_off000140c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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