Malicious PDF — malware analysis report

Static analysis result for SHA-256 e45cefba9aa473d8…

MALICIOUS

PDF

73.9 KB Created: 2021-06-03 03:50:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 42d775da92980759fce419feba1b679e SHA-1: 044dc1f8ae7abd3d1790128fc8b53bf4768f2c96 SHA-256: e45cefba9aa473d8b289b3ddbd7815293c2220ec3b43de572b258df4a544a84e
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 machine learning classifier and ClamAV, as malicious phishing content. It contains numerous external URIs, suggesting it functions as a link farm to direct users to potentially harmful websites. The presence of embedded URLs and the overall structure indicate an attempt to deceive users into clicking through to malicious or unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://chcial.ru/pbw?utm_term=sky+sports+stream+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453719/normal_60346b0f62493.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480895/normal_5fcdfc6db0a97.pdfIn PDF document text
    • https://vafuxukosa.weebly.com/uploads/1/3/4/4/134440110/9070781.pdfIn PDF document text
    • https://rewudorabemomaf.weebly.com/uploads/1/3/4/2/134234845/b50d2ed0c549.pdfIn PDF document text
    • https://sidatenut.weebly.com/uploads/1/3/5/3/135349940/pononopa_gefikowemegi_nanitejeluzimu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413239/normal_600573f8359ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448341/normal_60246250cf524.pdfIn PDF document text
    • https://gesogakit.weebly.com/uploads/1/3/4/5/134581759/dedbb7a8311cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_601525a9d8b46.pdfIn PDF document text
    • https://xopaluwejur.weebly.com/uploads/1/3/1/8/131857284/nijumotivavepiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_604fb7e1eb35d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_602f521854e7d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5fe14af1f1b35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mibegenav.pbworks.com/f/gugijuludijegujafe.pdfIn PDF document text
    • http://kiletejude.pbworks.com/w/file/fetch/144427605/what_is_activation_in_neural_network.pdfIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144411726/15402790286.pdfIn PDF document text
    • http://xelivolofuso.pbworks.com/f/cognitive_behavioral_therapy_for_dummies_download.pdfIn PDF document text
    • http://gamaxidad.pbworks.com/w/file/fetch/144536886/what_percent_of_mksap_to_pass_abim.pdfIn PDF document text
    • http://detomipipu.pbworks.com/w/file/fetch/144529146/que_significa_soar_con_cucarachas_en_el_cuerpo_de_otra_persona.pdfIn PDF document text
    • http://mapaduzipi.pbworks.com/f/analyzing_the_red_scare_worksheet_answer_key.pdfIn PDF document text
    • http://wurutaw.pbworks.com/w/file/fetch/144512376/baahubali_2_movie_download_in_hindi_hd_720p_filmywap.pdfIn PDF document text
    • http://sizolasipape.pbworks.com/f/kalnirnay_april_2019_marathi_calendar_download.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/bengali_movie_bondhu_full_movie.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/f/excel_community_medicine_12th_edition_free_download.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144447819/zafulevevojef.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE540 5200 bytes
SHA-256: 0f432d3387dfdf662a8555fa37782f1d5aba7d5fa9540ecef965e7368a9a3095
font_01_sfnt_off0000f6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E8 10460 bytes
SHA-256: e8cfd2ff127bedd3aabe683c92048dd5c7728e5d02e563bd7dfa0ff55d24f386