Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a66a03817250f71…

MALICIOUS

PDF

74.3 KB Created: 2021-03-27 19:17:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44f0958167d2c8e67327aa15f800fc54 SHA-1: 77557d3879836ab1c784d6556378a4e3b84ad165 SHA-256: 5a66a03817250f71e0a6ce4423d528a01cc52cdee5bbd0d8e4fa29e223ab8444
96 Risk Score

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that masquerades as a construction site inspection form template, likely to trick users into clicking it. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://golowaki.ru/123?utm_term=construction+site+inspection+form+template
    • http://opensalle.xyz/nudizogamudadisimome0cvic.pdf
    • http://cmb-accueil.com/train_driving_simulator_games_3dnlpok.pdf
    • http://mini-cam2.club/sportcraft_treadmill_2.5v0zgx.pdf
    • http://oneitshop.pro/photoshop_book_in_telugu_free_download4zbkv.pdf
    • http://watulexop.iblogger.org/lame_enc_dll_audacity_1._2_6.pdf
    • http://uorott.com/how_to_reference_a_cell_in_excel_vba8g3ic.pdf
    • http://roman-holidays.shop/what_is_frog_and_toad_aboutel6bj.pdf
    • http://demask.space/how_to_write_a_complaint_letter_to_uspsyxyta.pdf
    • http://autobaff.xyz/la_seleccion_kiera_cassp3yxs.pdf
    • http://futevosug.22web.org/grattan_institute_report_2018.pdf
    • http://musc-media.xyz/organic_chemistry_brown_7th_edition_solutions_manual_freetqib8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/b02877b0-b7a4-4a69-abb0-424cf2d53c8f/3nf_and_bcnf_in_dbms.pdf
    • https://uploads.strikinglycdn.com/files/f818607b-b478-44f3-96a3-4dd0725064d7/rimepejovabet.pdf
    • http://limizepafut.epizy.com/98750368836.pdf
    • https://9334512a-4df1-45dc-8804-f0fa1d9e2a3d.filesusr.com/ugd/9466eb_c2585f8f87094d9b9e3f71020650f41c.pdf?index=true
    • https://cf587a47-7c2f-4f55-8bbb-21a4c73503f7.filesusr.com/ugd/8ea597_3db4ad37858b4337bacdfac4dd8f3e59.pdf?index=true
    • http://mewiwujudulixe.epizy.com/zurudafisegolel.pdf
    • https://uploads.strikinglycdn.com/files/37c13c33-22f9-4b91-994c-ceb2070a7d49/fagunilorobegepalulosuvaw.pdf
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_8fed6ff9276045168287e08802d12440.pdf?index=true
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_afc116a659a3435ba452aa69714e90b0.pdf?index=true
    • http://puxotug.epizy.com/buxoweg.pdf
    • http://bozalusi.epizy.com/chaparral_pro_light_italic_free.pdf
    • https://uploads.strikinglycdn.com/files/378bb506-0117-4d1b-9c4c-c77c45760357/vikarirogijodunox.pdf
    • http://sarupisegov.rf.gd/fabegifesakuz.pdf
    • https://uploads.strikinglycdn.com/files/182ba952-63e5-4062-a497-e004704645ca/mewerebiwa.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_off0000e74c.bin
be4c5a7a20c9c787618dd96304918f5bde61abce1e3b52618b8c60c6441ddad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 5064 bytes
font_01_sfnt_off0000f86c.bin
f8b4c2e09043e93bbd8d5312771b8cd612830a0185556b34342dfb122abec35d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF86C 10360 bytes

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