Malicious PDF — malware analysis report

Static analysis result for SHA-256 eedc245a517d3833…

MALICIOUS

PDF

93.9 KB Created: 2021-08-04 00:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 9a8b18fc3e3a4b6db94847a6a1b87330 SHA-1: fe7a454cd5878f76a74c5e54b3eb91d758200863 SHA-256: eedc245a517d3833a30233142a2e147d99282f8146c1e7bae6d6e175a2edff38
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that function as a link farm, directing users to potentially malicious websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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.
  • 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://floridainvestment.cz/files/file/punuritavojojerovu.pdf In PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/bihs5biv5ucsd27443l0rn3c2r/bakaxawitixefowaluxob.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/5574cae5660fd8f93bc2c24c2b563bd8/43541683639.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/wonuzukev.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d09c4ac0248---mawikelilujawenavonize.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/sowarumajepemuri.pdfIn PDF document text
    • http://daiichilogistics.com/uploads/news_file/84546912886.pdfIn PDF document text
    • http://es-manzokudou.com/yamituki-n/uploads/files/58655973957.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/607783fa67b2b9af75ffaca8bd35e833/wazaxom.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/utlten0d09up71cnqtg42bn7d1/lumimi.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a638119c474---33453432073.pdfIn PDF document text
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/tjuh7s29uj7nce5dnpaob0a3l3/zitem.pdfIn PDF document text
    • http://starcity-vinhomes.vn/app/webroot/img/files/58903532648.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce0fc20ece---kiwofagijalusixatemulut.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078d1a0130a8---81401539420.pdfIn PDF document text
    • http://farashimirooz.com/files/ninadolepidudatovo.pdfIn PDF document text
    • http://johnsonsdynastyincfamilyassociation.com/clients/10108/File/vinikaravof.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/4tojfjqm81m3uj4uq31i4djr17/13569789675.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/ej2l7j96svopqe75g5qe8mq9ec/77318091027.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d5d555c3d7---10469308279.pdfIn PDF document text
    • https://isleo.com/i_photos/file/ladosawudivu.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb8f70a2d4---20200432243.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/5194cc054f5373b5f8610f028371dbbd/25151012115.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/2010944091.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/f7849c3f304b287e2b2dd4bb43af50b6/79687221517.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=abbyy+finereader+15+full+cr%40ckPDF 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_off0000f701.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF701 30936 bytes
SHA-256: 56569974987c4d10dc07aff97fae80c1f6a168b1dfffeca9caa623b25fc3623c
font_01_sfnt_off000134bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134BC 11012 bytes
SHA-256: 2847c2afac584301f07e703528acde485a52e8cae1af4b607b8b2c6f6f54df96
font_02_sfnt_off00014e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1