Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9eb46136190367…

MALICIOUS

PDF

81.6 KB Created: 2021-03-23 02:15:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2d3d687a49baea850600d51dfdff86bd SHA-1: b3444abf91bf91f465f66a5721125ac7c4795048 SHA-256: 2d9eb46136190367b1cc4f84910f0811ab217e5738e67103046e5a4be1154a84
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary suspicious URL pointing to 'dugedepap.ru'. Heuristics indicate the PDF acts as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

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://dugedepap.ru/award?keyword=psychiatry+cases+for+medical+students+pdf PDF link annotation
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/21371.pdfIn PDF document text
    • http://buzevuzelape.mywebcommunity.org/nefosukorujugibu.pdfIn PDF document text
    • http://vijofudevadotar.mywebcommunity.org/8268946648.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/7eb1d23d167f40c.pdfIn PDF document text
    • http://liko-sneakers.com/pemudarigunalezi1xev.pdfIn PDF document text
    • https://xoxomedeze.weebly.com/uploads/1/3/5/3/135308121/wujani_kunisamebitilem_dosirem.pdfIn PDF document text
    • http://bigakeka.iblogger.org/tagotoduf.pdfIn PDF document text
    • http://silvanozito.online/75822626324g2i7r.pdfIn PDF document text
    • http://vidavubaxo.22web.org/aprendizajes_clave_preescolar_libro.pdfIn PDF document text
    • http://takovevagagiv.scienceontheweb.net/piwejizujolomidame.pdfIn PDF document text
    • https://komibaxes.weebly.com/uploads/1/3/1/6/131606619/2e4a0c342e0.pdfIn PDF document text
    • http://zupiworifokovaw.22web.org/astm_a572_free_download.pdfIn PDF document text
    • http://sesalon.xyz/what_is_a_pgn_file_in_chess757el.pdfIn PDF document text
    • http://wildber.store/adverbs_of_frequency_exercises_b1s3oiz.pdfIn PDF document text
    • http://avit0.pro/xefudibapadk3ayh.pdfIn PDF document text
    • http://badamow.iblogger.org/voxojepoxolo.pdfIn PDF document text
    • https://jowujutaxafekul.weebly.com/uploads/1/3/5/3/135348014/dukosudofudifev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vapasiwivomod.epizy.com/vidmate_old_version_for_android_phone.pdfIn PDF document text
    • http://tudixuzaw.onlinewebshop.net/sanimakatek.pdfIn PDF document text
    • http://rebobimakefeli.epizy.com/cypress_test_report.pdfIn PDF document text
    • http://wikosupiz.epizy.com/boxing_drills_for_beginners.pdfIn PDF document text
    • http://vapedefomagejev.epizy.com/caffeine_app_for_mac.pdfIn PDF document text
    • http://moliposapivar.epizy.com/93109270733.pdfIn PDF document text
    • http://zovagupegi.rf.gd/73851319883.pdfIn PDF document text
    • http://pimibini.epizy.com/endochondral_ossification_steps.pdfIn PDF document text
    • http://valikidaku.epizy.com/pdf_of_biochemistry_by_lehninger.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://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_off0000ed09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED09 5496 bytes
SHA-256: 07eea1985718eda149e094d8f2f5acf79ef2909c814262d1e27f469cf498d040
font_01_sfnt_off0000ff9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9C 10580 bytes
SHA-256: f91e21d3fd90e9b4076f442454f567227bc7e0b1d0b271e8c1abe76fa1bc3a9b
font_02_sfnt_off000123c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C6 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7