Malicious PDF — malware analysis report

Static analysis result for SHA-256 748e2029dbf73339…

MALICIOUS

PDF

72.0 KB Created: 2021-02-18 07:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e7241e86c57a327a4b44c51a9a56782a SHA-1: fe404aef90d7438c7d7885297c65851217edef85 SHA-256: 748e2029dbf7333903ffeaf1f17087c3f0a1d480367f0b667f5580d6908c709d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, as indicated by the 'PDF_SEO_LINK_FARM' heuristic, suggesting a link farm or phishing attempt. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature. The embedded URLs point to various domains, some of which are associated with potentially malicious content, and one URL is specifically linked to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jacksth.ru/strik?utm_term=how+to+make+chicken+nuggets+crispy PDF link annotation
    • http://operationhomeplate.com/zisavuxosorumegimutolupl9ino.pdfIn PDF document text
    • https://faturigazed.weebly.com/uploads/1/3/4/8/134859690/dotaxewoje.pdfIn PDF document text
    • https://cdn.sqhk.co/tizalenifo/jbjgFhH/rumble_strips_road_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/ewPEjh7/my_safe_notes_app_forgot_password.pdfIn PDF document text
    • https://winenexosipagep.weebly.com/uploads/1/3/2/8/132814343/kegerurapagagusi.pdfIn PDF document text
    • https://cdn.sqhk.co/sugutomipu/ijhckif/luwijoguzelopono.pdfIn PDF document text
    • https://cdn.sqhk.co/vunalogivefu/frR9UE2/zoom_cloud_meetings_app_free_download_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/hgJihhg/online_code_editor_html_css_javascript.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/ecojejd/judgement_ps4_amazon.pdfIn PDF document text
    • http://cmbclientes.com/61315718064r73vu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/44448601462.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/ditadap.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/hyrule_warriors_weapon_fusion_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/64666910265.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/sheet_music_he_giveth_more_grace.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/daretokogabajunosona.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/periodic_table_trends_practice_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/varolexexus/hydatidiform_mole_vs_blighted_ovum.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/organic_chemistry_questions_and_answers_grade_12.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_off0000d95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD95E 5532 bytes
SHA-256: c5e1eedbb5120bab39bdba941188b4c626d3b5bdbd47737ca6f35b452ed4c1bb
font_01_sfnt_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 11464 bytes
SHA-256: 001f32c7abe7c180308e589f0379ed07e362709d68be3549191b5b6bdaedf755

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