Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8d64cac799b9561…

MALICIOUS

PDF

73.6 KB Created: 2021-01-23 13:30:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cc531ed55491895594d45bc3bd89ae52 SHA-1: 32a15757560a4083361a094fcb2a93a73d5ae5ce SHA-256: d8d64cac799b95611af634be0af7dca361b8270b63496c1f83b27ea1fade06e2
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, many of which are to S3 buckets and other cloud storage, suggesting a link farm or content distribution network for malicious files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/123?utm_term=positive+words+that+start+with+fr PDF link annotation
    • https://cdn.sqhk.co/gapekozuwa/bjgi9GL/closeness_in_a_short_sentence.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/14757093145.pdfIn PDF document text
    • https://cdn.sqhk.co/sebixodof/hjDjbhb/driving_school_2018_hacked_version_download.pdfIn PDF document text
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/2c7e8a78ddb.pdfIn PDF document text
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/talazif.pdfIn PDF document text
    • https://cdn.sqhk.co/risubibasero/jjehgi9/dream_daddy_mat_date_answers.pdfIn PDF document text
    • https://xapitutas.weebly.com/uploads/1/3/0/8/130813648/11d1eb3131e127.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/xupimaral/citi_card_benefits_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/squirtle_shiny_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/access_control_system_components.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/contrast_catastrophism_and_uniformitarianism.pdfIn PDF document text
    • http://ladorum.epizy.com/plural_worksheets_for_grade_2.pdfIn PDF document text
    • https://s3.amazonaws.com/nijudow/lose_yourself_instrumental.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/english_cocker_spaniel_haircut_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/where_does_android_store_app_passwords.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/cutting_edge_3rd_edition_elementary_workbook.pdfIn PDF document text
    • https://s3.amazonaws.com/kugelilizibuwum/biceps_workout_with_dumbbells.pdfIn PDF document text
    • http://metusajixano.epizy.com/printable_car_log_book_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/axillae_singular_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/japesubobepojuniwad.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_off0000e4cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CD 5116 bytes
SHA-256: cbddd7a9d27fbd6d25ea90b9f0a281c7310655a4e512f7eb1c8ca8550326f537
font_01_sfnt_off0000f647.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF647 9672 bytes
SHA-256: 65c75291aa249ae6fcd0f378bd8f2b7fa6875c44b6c345f5601d3ffdc6e81b54

Open this report in the interactive analyzer, or submit your own file for analysis.