Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e51ee1e3369e58…

MALICIOUS

PDF

93.1 KB Created: 2021-04-05 04:45:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e40c272c9cb0a390d8d35d68c5219728 SHA-1: e7a6c0077c2f1548d2da838466615157ef3a9a89 SHA-256: 27e51ee1e3369e5841ef4fabca7f4117b49063bec2e5ddabd155e16e146e6fa7
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high ML score and ClamAV detection as a phishing trojan. The document contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing lure. The presence of external URIs and the overall structure strongly indicate an attempt to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=honda+6500+generator+battery+location PDF link annotation
    • http://supusatode.sportsontheweb.net/probability_worksheet_grade_10.pdfIn PDF document text
    • http://jijomaj.getenjoyment.net/78308973417.pdfIn PDF document text
    • https://maraliva.weebly.com/uploads/1/3/2/7/132712127/dd3ab97a9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476596/normal_603427ed916a6.pdfIn PDF document text
    • https://sejiganabukuja.weebly.com/uploads/1/3/4/5/134585043/f56a4.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/definitions_of_history_by_different_authors.pdfIn PDF document text
    • http://jibiduseg.22web.org/udemy_android_application.pdfIn PDF document text
    • https://pumagawiluzade.weebly.com/uploads/1/3/4/6/134697536/381c4041fda.pdfIn PDF document text
    • https://fezowekufeda.weebly.com/uploads/1/3/3/9/133999429/6553486.pdfIn PDF document text
    • https://sisezapude.weebly.com/uploads/1/3/1/3/131398367/tisuforufikoso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428052/normal_6046421ef1ee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425915/normal_606593bc102a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://saxarivoje.onlinewebshop.net/spontaneous_bacterial_peritonitis.pdfIn PDF document text
    • http://rosurujonuzaxa.epizy.com/ferod.pdfIn PDF document text
    • http://padadubijimesib.epizy.com/soal_dan_pembahasan_biologi_sma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0eff5d6f-922f-4bf7-9e2e-8c8d77deb482/piranapagitutigokigeridi.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/61037970399.pdfIn PDF document text
    • http://pujusojup.epizy.com/sort_excel_sheets_alphabetically_vba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa101fff-48e4-4261-b4f1-62d70e610813/jipenigirejexupari.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/57128710358.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03b6a2c1-fa7c-46a7-8431-cd751a696c63/how_to_feng_shui_your_dining_room.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2778a644-40f7-4ebb-8451-c171c49af793/53364975243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860e5d27-18b1-4f21-a4e6-74fdded034d1/how_to_configure_wd_cloud_storage.pdfIn PDF document text
    • http://xevijojikutep.onlinewebshop.net/23975021019.pdfIn PDF document text
    • 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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011af8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF8 5552 bytes
SHA-256: 48ae51ef9db5334585257ddda04cde76aad58d771d4118fe05d048ff12bf4a12
font_01_sfnt_off00012ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDF 6068 bytes
SHA-256: d2d10b6b0c668cf26faa9347c7054f8580c7eefa5cb7aecda2a4fba74bd025f0
font_02_sfnt_off00013d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D90 12300 bytes
SHA-256: e4ea1ab108e73ef5457cf8955958ab75fa4b4cf1c2605ddef25b1f42a9c7d13d