Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3c03c2e1df2ece5…

MALICIOUS

PDF

76.6 KB Created: 2021-03-05 14:42:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 36fc10e140791ad77320ae131dd89e04 SHA-1: 0b6232a93e221c4745cb23a97bd6aeb7a89f9f69 SHA-256: a3c03c2e1df2ece5e657529f23a6b9fa6e3bab5c457e494baa9ea781d10a9e77
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://crophysi.ru/wix?keyword=balto+characters+tv+tropes'. ClamAV also detected it as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The ML classifier strongly indicates maliciousness. The embedded content appears to be obfuscated or corrupted, but the primary threat is the malicious URL.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/wix?keyword=balto+characters+tv+tropes In PDF document text
    • https://static.s123-cdn-static.com/uploads/4463529/normal_5ff8a4a9baf40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391899/normal_5fe268e5d0f12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fd30dc5c964e.pdfIn PDF document text
    • http://fasabaf.22web.org/melunopag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366389/normal_5fe5d18728502.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380871/normal_603c6942b8ddf.pdfIn PDF document text
    • http://komamoj.22web.org/algebra_1_coach_book_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457279/normal_60326312588af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412408/normal_600757352707e.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/dukavunivifa/delivery_invoice_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b469270-9640-45a1-aefd-4ff86feea4de/husqvarna_125l_carburetor_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/97061014075.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/93791137383.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/bill_of_lading_format_in_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fbdf4e1-b09a-4e44-afcc-e9cf34212ab6/chrono_trigger_snes_cartridge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d68b233-09da-4856-a49f-8fe53c295a1e/zodikibitalareku.pdfIn PDF document text
    • https://s3.amazonaws.com/kuboki/77888587596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc8b0be5-daad-4852-b726-3159b67e9e08/how_do_you_write_a_self_evaluation_comment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/709ddf09-cf0d-4564-bc65-da67056adad2/what_are_good_names_for_big_dogs.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/vufuxomuxar.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/67279272129.pdfIn PDF document text
    • http://sikirubuguje.epizy.com/24221347450.pdfIn PDF document text
    • http://jebufatibakuv.epizy.com/algebra_1_practice_test_with_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wufujudisu/al_quran_digital_pc.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_off0000eede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDE 5132 bytes
SHA-256: 15bef9c77b2da3973453cd6795494c6327649c340feed31dde9b833575d274ad
font_01_sfnt_off00010054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 10812 bytes
SHA-256: 493dd24de071e2a3443686dca06d389bb551d50dce943ccbc4526d112d52aab2

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