Malicious PDF — malware analysis report

Static analysis result for SHA-256 73e1475f8d7737a3…

MALICIOUS

PDF

81.4 KB Created: 2021-03-19 18:52:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e8b63dd739bf4c8427f69ef53aae2a1 SHA-1: 73c410311a37b092e30cb52400fb357acde85b95 SHA-256: 73e1475f8d7737a32077805f2950f8775b4a2070f291d60de4844727b6103ce2
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'midufefew.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/aws?utm_term=dale+carnegie+how+to+win+friends+quotes
    • https://cdn.sqhk.co/dekaroku/Hggpjbw/catchmaster_bulk_glue_can.pdf
    • http://lobuzef.iblogger.org/worry_free_money_shannon_lee_simmons.pdf
    • https://static.s123-cdn-static.com/uploads/4530070/normal_5feb0191b98a1.pdf
    • https://cdn.sqhk.co/dixejetafap/3Njbie8/instagram_black_theme_oneplus_6t.pdf
    • https://cdn.sqhk.co/zativojor/jh3hdjb/speedball_marvel_agents_of_shield.pdf
    • http://tajoraf.22web.org/turning_fractions_into_decimals_worksheet.pdf
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/befumebidowajodopeji.pdf
    • https://cdn-cms.f-static.net/uploads/4413223/normal_6018a3588c842.pdf
    • http://pivolirarorip.mypressonline.com/how_do_you_know_when_a_guy_is_interested_in_you_over_text.pdf
    • https://migufakugiguxob.weebly.com/uploads/1/3/4/5/134579218/23b9d.pdf
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/3418501.pdf
    • https://rupimobo.weebly.com/uploads/1/3/4/8/134891389/b99ea8b357d2e93.pdf
    • https://cdn.sqhk.co/jubawiwa/dSFhdZp/suligoke.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vogijub.rf.gd/algebra_nation_practice_book_answer_key_section_2.pdf
    • http://tadiwolavis.epizy.com/302808561.pdf
    • http://vumamuv.myartsonline.com/understanding_earthquakes_and_tsunamis_reading_comprehension.pdf
    • https://uploads.strikinglycdn.com/files/cf660186-134b-454b-adf0-431296a3fe1a/16935849987.pdf
    • http://rodexiguv.onlinewebshop.net/debitupuwomipo.pdf
    • https://uploads.strikinglycdn.com/files/f214cd98-232b-4bbe-89f8-9a38cfa1c4c2/el_conde_lucanor_adaptado_vicens_vives.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe4f.bin
17475757658030274185e10a476da22afa1ff9c173c6fc9b3c9ccd494fca8e6b
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE4F 5500 bytes
font_01_sfnt_off0001110d.bin
9ac103342754d4d9c3e5f886c1e0df5ae02cdf9d4f1853f6abc8e9a2e4f87dbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1110D 11032 bytes