Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e4004d9625eb6bd…

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 01:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 15c91a7c28b9c25784836771c1578e04 SHA-1: f5955d246b3f9ce4da6ef1dfa8bab9e2ba22243f SHA-256: 0e4004d9625eb6bd0fb6d39348693d8abc77522ecf0c3826d6511e52ff879488
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple compromised WordPress sites, which in turn host other PDF files. This structure suggests a campaign to distribute malicious content, likely for phishing or malware delivery. The ML classifier strongly indicates maliciousness, and the presence of multiple compromised CMS upload links reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e54acf82dd1---dowalaraxexoxibunufa.pdf In PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cffc958d7f---26747455890.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab850adf292---91517187904.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/35579962311.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b0ecd9d47---57856423657.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/21059786224.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160701bae84df3---10613277102.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c9d4245a8---gagokajopamevolo.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/5d55c6d7495da6644fabc9b5e75888a1/xomadupapidipepotanodo.pdfIn PDF document text
    • https://cavalier-king-charles-spaniel.ch/userfiles/file/99747731003.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf57ca561b---biromukenogodov.pdfIn PDF document text
    • http://didula.ru/img/file/4324685729.pdfIn PDF document text
    • http://bosch-service-center.ru/uploads/files/78468029391.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/jt55cubmj35ltab4n9tom89j7g/34479629153.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/9luc72opho1tcb2koi0836g1lh/73489924993.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607269c06de65---xitovuzakuvel.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/dae392db43317c114cbafd8d4e9a767a/47910470701.pdfIn PDF document text
    • http://heninrealty.com/userfiles/files/52107248982.pdfIn PDF document text
    • https://motiwalainstitutes.org/userfiles/file/36448699715.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/71303068020.pdfIn PDF document text
    • https://bevasilicones.in/userfiles/file/67548197356.pdfIn PDF document text
    • http://ustunongel.com/image/files/zafavuxe.pdfIn PDF document text
    • https://soechi.com/userfiles/file/77079934472.pdfIn PDF document text
    • http://tries.cz/media/images/upload/file/ratunurevabuliga.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/1ff8a2cc1efd741e9eeb07880960656d/nuzoxurikoribo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=ncert+class+10th+history+chapter+1+question+answerPDF 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_off0000dff0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF0 11068 bytes
SHA-256: f73d259103ef5c6a1d921eadbf0a4e8652db073cf3228cd4f0b81bd08137cf4d
font_01_sfnt_off0000f9c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C8 17740 bytes
SHA-256: 57e1e02e3853e5672c561047c32bb6cc9e13afcd499f6a153ecad2eed112c2d1
font_02_sfnt_off00012761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12761 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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