Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7ed8b9f51d9640…

MALICIOUS

PDF

68.7 KB Created: 2021-09-12 09:46:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: cbf89c8dc2b2907d3abe2d176ccda5f9 SHA-1: 7b633ed8f216ec8d980591f8f6c9841bcea87ca0 SHA-256: 6d7ed8b9f51d964077207f2b789f0b0de83062265b9cc91b3a793f9f8a092502
146 Risk Score

Malware Insights

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

The PDF exhibits characteristics of a phishing lure, including being image-heavy with minimal text and containing numerous external links, some of which are on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://pedraferro.com/files/files/99560995435.pdf In PDF document text
    • https://elearning-chemistry.ro/userfiles/file/pozipowadudavivuluzoleto.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/biperenukulokumetikag.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/dafosutasemufemojifen.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/26540411733.pdfIn PDF document text
    • http://benly-carson.com/product/files/godulivoj.pdfIn PDF document text
    • http://kargo-box.com/uploads/files/43987213207.pdfIn PDF document text
    • http://bsa-billiard.by/images_from_html_editor/file/kituxemolifa.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/12260160721.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/19194487385.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/fufawevunajilubix.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/motunevix.pdfIn PDF document text
    • http://dalhousieretreat.com/cote_dor_import/admin/ckfinder/userfiles/files/tutote.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/31003405137.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/26754798293.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/podixipibifopopi.pdfIn PDF document text
    • http://khunghinhdepphuctin.com/media/ftp/file/noziwimafigixazase.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/8030210325.pdfIn PDF document text
    • http://saatgaamkansarasamaj.com/admin/uploads/files/luvakogobenavapupelidan.pdfIn PDF document text
    • https://granitabrasive.com/editor_up/51073118902.pdfIn PDF document text
    • https://schmitz.cz/res/file/88359694947.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/39663217216.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=does+pink+and+green+make+purplePDF 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_off0000b0d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8EA 14200 bytes
SHA-256: bb4369fc43b0495b8fd19d8581bf5b6c784e707c61eda9a1c4a91921a93b9497
font_02_sfnt_off0000ec4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 10828 bytes
SHA-256: 84e89f71f6f87e66c1efa37fd77fe9d435a62d589a42e06951926411df3f54a9