Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5ff6f43289519bc…

MALICIOUS

PDF

78.0 KB Created: 2021-04-08 06:41:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8cb9efbb92bee46d17e1cced88a680b4 SHA-1: e9120dd2da04f2a76352548d865dfbc3abe7cc11 SHA-256: c5ff6f43289519bc622ccfbad9711f8a7d0fef8e7b47565cb868cee58739eb46
126 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains numerous embedded URLs, with at least one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/wix?keyword=lg+lcrt2010st+trim+kit PDF link annotation
    • http://nagesebaz.iblogger.org/42154936090.pdfIn PDF document text
    • http://lexisunat.iblogger.org/zanopulufirofixubog.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabesazuxipuf.epizy.com/sadlier_vocabulary_workshop_level_c_answer_key_unit_8.pdfIn PDF document text
    • https://s3.amazonaws.com/nevovumowa/letter_n_tracing_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc1b109-2542-4ad1-a588-ef1fe55723e2/what_is_step_6_in_na.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e05810f9-dc08-4bc9-9cbe-8428a7b0b96a/95344680074.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b0adeef-1a7e-4e93-855f-d0d868498b59/how_to_say_yeshua_in_hebrew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b0502af-6ae6-4e3a-9302-bafec7e64c9c/special_right_triangles_45-45-90_worksheet_answers_with_work.pdfIn PDF document text
    • http://vedewujesog.rf.gd/76161450838.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/bahubali_2_full_movie_480p_mkv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e03253ba-b10d-4054-8670-fd4bc60d845a/49663972528.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/47340360066.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/52659852481.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/banana_pi_m3_os.pdfIn PDF document text
    • https://s3.amazonaws.com/godoremitiwuja/tcnicas_de_intervencin_en_crisis_psicolgica.pdfIn PDF document text
    • http://zoguberuwanu.rf.gd/3540879278.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/dyson_dc25_cleaning_cyclones.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/59115696739.pdfIn PDF document text
    • http://xaxibalese.epizy.com/98261766092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c016672-5d43-485b-92a8-dccf2f4064b9/la_riqueza_de_las_naciones_resumen_libro_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d23379-c9d4-4e16-941c-1c986b8e1198/25742032464.pdfIn PDF document text
    • http://renezaw.rf.gd/lunuxowutadenuwisabiwika.pdfIn PDF document text
    • http://nonozud.rf.gd/ajouter_dictionnaire_clavier_android.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_off0000ed0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED0A 5240 bytes
SHA-256: 893947cbc74844aa48cc3c01c14fb02cd91ed4b7c2e246dc84a3cf8c6dc3d2b3
font_01_sfnt_off0000fedb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEDB 12444 bytes
SHA-256: ec2469317a3c69f26d018b3f0cb0f55aeaefd2a106983bfdaf220119e4f724c6

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