Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fc57ad5920612d8…

MALICIOUS

PDF

70.6 KB Created: 2021-04-06 00:55:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a6e0bbd286696c2a1555328e38db0fd8 SHA-1: 1ee2b2cfd8a4d50c49cde08722bda0ea9be184ab SHA-256: 3fc57ad5920612d8c7475ffab55c7682568b533267552b42f5cdbb67a14a7efe
96 Risk Score

Malware Insights

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

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL that leads to a suspicious domain, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to reference a label maker manual, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=manual+rotuladora+brother+pt-d400 PDF link annotation
    • http://sitebomobegux.sportsontheweb.net/best_human_anatomy_book_for_medical_students.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_5fe70eb83e79c.pdfIn PDF document text
    • http://kogejirupu.getenjoyment.net/chuyn_sang_jpg_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490273/normal_600a41e4d6e6a.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/adobe_photoshop_express_tutorial.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/pajukovuxetu/sexetalosowukut.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/49337446201.pdfIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/78514019550.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/best_case_for_galaxy_s9_note.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/vegofaduxubap.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/free_css_templates_for_photography_websites.pdfIn PDF document text
    • http://firejevewonoba.rf.gd/probability_and_statistical_inference_mukhopadhyay_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/tiwabazigizotigux.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/ladavanadusoradeji.pdfIn PDF document text
    • http://dodudizoga.epizy.com/ccna_labs_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/currency_converter_app_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/38467466812.pdfIn PDF document text
    • http://virunapiwo.epizy.com/ganpati_atharvashirsha_lyrics.pdfIn PDF document text
    • http://galiwasik.rf.gd/joint_commission_anticoagulation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tarizirefevifab/salud_publica_concepto_segun_la_oms.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/rokaxakobob.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_off0000d43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43E 5276 bytes
SHA-256: c4deff5d486bf286e836335097d420cf0ca7b3deb2e11a429e513371145f1bce
font_01_sfnt_off0000e634.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE634 11888 bytes
SHA-256: 2b1207490e054034d1e46b100e21948ad282713a059cdc27b0ae2ce261813019

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