Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcbc1bb1c52a517d…

MALICIOUS

PDF

67.2 KB Created: 2021-01-16 09:28:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8dad0fa586187568b28805dbe1142d81 SHA-1: 29410cba227f15270587fd59bb8537557d6e4f68 SHA-256: fcbc1bb1c52a517d4bbf7bf0cca6f01cc3e0d607c80b5093d9eed7debc33649a
96 Risk Score

Malware Insights

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

The file is a PDF with a high ML classifier score and ClamAV detection, indicating malicious intent. It contains an embedded URL pointing to 'trafftec.ru', which is likely used to redirect the user to a phishing site or download a secondary payload. The PDF structure and embedded content suggest it's part of a phishing campaign, leveraging the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/123?utm_term=html+%2526+css+design+and+build+web+sites+epub PDF link annotation
    • https://cdn.sqhk.co/jegamaxegev/j0zjigi/binorunitagawunofava.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465257/normal_5fe332573a28b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445739/normal_5f9e584b13d1f.pdfIn PDF document text
    • https://site-1168410.mozfiles.com/files/1168410/ramizuju.pdfIn PDF document text
    • https://cdn.sqhk.co/kopizikob/hdieC8g/game_development_training_for_free.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/ii7Uhc8/7921701832.pdfIn PDF document text
    • https://cdn.sqhk.co/xedufoga/ibxhbij/talisman_board_game_4th_edition_expansions.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5fe9212c45c35.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/bodajaku/metformin_vs_metformin_er_cost.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/stand_and_deliver_movie_worksheet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/verbal_test_sample_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/obituary_template_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/kojas.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/23919243806.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_off0000cee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE7 4300 bytes
SHA-256: 869a31b88ae2032dc6ad84738bd018dbd2480337955162faab98b05cf9d51cf4
font_01_sfnt_off0000dd66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD66 10264 bytes
SHA-256: a951e0c1115c2b6702d3dd15425dfdfb9d5076f623ab2a4ed9822f8489b57884