Malicious PDF — malware analysis report

Static analysis result for SHA-256 f683080124e73b8a…

MALICIOUS

PDF

108.3 KB Created: 2021-04-07 14:15:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e240104226bd87a97f0fbe9c1b57a08e SHA-1: 4ed8cea282c47bf11bb7231bdc494d94ae302237 SHA-256: f683080124e73b8a3fd98c366bc2f0e18669bdf6351157f02a51adf8631900e9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous embedded links, many pointing to disposable hosting domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xezojetit.ru/123?utm_term=maplesaga+leveling+guide PDF link annotation
    • http://piwulefimer.22web.org/free_printable_contraction_worksheets_third_grade.pdfIn PDF document text
    • http://sotatetivula.iblogger.org/adding_fractions_word_problems.pdfIn PDF document text
    • http://tulavesew.getenjoyment.net/what_is_the_role_of_indigenous_knowledge_in_the_indigenous_science.pdfIn PDF document text
    • http://mugukix.mygamesonline.org/gaxusuran.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/61290662483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496013/normal_5fcf2dc3195db.pdfIn PDF document text
    • http://nipikul.22web.org/yanni_tribute_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/aPIjhdc/97872277451.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388283/normal_5fe924f719d82.pdfIn PDF document text
    • https://cdn.sqhk.co/pejasibupap/iaigygf/capture_the_flag_book_summary.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/what_is_transformational_leadership_google_scholar.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/gOia7hc/kifav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456686/normal_5ff26cbbef8ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gipunixufekuto.epizy.com/28737270935.pdfIn PDF document text
    • http://wonetone.rf.gd/les_accords_de_jazz_au_piano.pdfIn PDF document text
    • http://lopoduki.rf.gd/kali_malayalam_movie_in_tamilrockers.pdfIn PDF document text
    • http://mizujem.epizy.com/deformation_of_the_crust.pdfIn PDF document text
    • http://fabevurubojob.epizy.com/hebrew_christian_songs_mp4.pdfIn PDF document text
    • http://sedegavokoxuk.epizy.com/janaluxodet.pdfIn PDF document text
    • http://ruzuvune.epizy.com/argonautiche_libro_1.pdfIn PDF document text
    • http://gofudawaropuz.epizy.com/lukisuridibafajo.pdfIn PDF document text
    • http://fugegodipe.epizy.com/xijikipuzizulorise.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_off0001690e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1690E 5096 bytes
SHA-256: 40e63967dfe9074d8ec55008059a0c6f5fff2a5d9b4d38075dd166a75b2d44fb
font_01_sfnt_off00017a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A8B 12172 bytes
SHA-256: 407d93181b368f1b31a3cc5b05349ed1c8a8273206f29868673e79ed1ffe16a4

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