Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd78fcb3f94e41f0…

MALICIOUS

PDF

89.2 KB Created: 2021-03-19 00:55:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: ec9e2cb4baeee1d4f98a32b70ba5152b SHA-1: dd2c00608937db1052fdb7addeeb8214b99fcf13 SHA-256: bd78fcb3f94e41f01e8acf658ac2b78713da9dea8efd13cc70756fed84132b68
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains text suggesting it's a lure related to 'icivics the constitution answers', directing users to external URLs. The presence of numerous embedded URLs, many pointing to disposable hosting, strongly suggests a phishing or scamming operation designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wix?keyword=icivics+the+constitution+answers PDF link annotation
    • https://cdn.sqhk.co/pigexebobe/Hzhhhge/war_and_order_tips_and_tricks.pdfIn PDF document text
    • https://cdn.sqhk.co/dilobowuz/NziVjaJ/revenge_of_the_ninja_full_movie_dailymotion.pdfIn PDF document text
    • http://romabuxaxaxo.iblogger.org/android_auto_beschikbaar_in_nederland.pdfIn PDF document text
    • http://labiluwewinedu.22web.org/excel_multiple_regression_analysis_and_forecasting_template.pdfIn PDF document text
    • http://kosolibanun.iblogger.org/26732403378.pdfIn PDF document text
    • https://cdn.sqhk.co/dawiredi/8gigcjb/jijeripotoba.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/TXJ9ogf/divx_codec_player_apk.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/zakunafu/english_to_filipino_dictionary.pdfIn PDF document text
    • https://d848e4b6-662b-4424-a759-963270729452.filesusr.com/ugd/30e015_0d562ddab6274850af78fd0c3f73381d.pdf?index=trueIn PDF document text
    • http://poramukuwulaji.epizy.com/sql_learning_online_course.pdfIn PDF document text
    • http://xofogijatoli.epizy.com/fusion_beats_bluetooth_headphones_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/97863584618.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/what_are_the_requirements_to_work_at_disney_world.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/82970415864.pdfIn PDF document text
    • https://f6180879-d31b-499c-8e42-fead7842c491.filesusr.com/ugd/007227_8a4ad89c6ff045a2b2e0379c384b5320.pdf?index=trueIn PDF document text
    • http://regisebe.epizy.com/apc_smart_ups_c_1000va_lcd_230v.pdfIn PDF document text
    • https://d6ac5066-27fc-4e71-a07d-b30af50dfe8b.filesusr.com/ugd/934fc3_be8cd720b76f483fb8ded8d39a9939d5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/high_build_sheetrock_primer.pdfIn PDF document text
    • http://malakevuxe.epizy.com/refikaniberegigofekakene.pdfIn PDF document text
    • https://8f0c9b82-9570-4081-bbb7-5e23a534ea09.filesusr.com/ugd/7008f3_0e3c237069f5441b860323646242101b.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_68db1d6063af4793a314df50a0c7f3d9.pdf?index=trueIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_6c2add6262e84de5be282a36209d7346.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A82 4944 bytes
SHA-256: 2e91720533ef99952443d1f23701d40735927ff155176f2a49fa322b353d52a1
font_01_sfnt_off00011b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B63 11280 bytes
SHA-256: 2e16840b37920d81d5a55625b340b5091cf0738a5905f2cdadd03e341d135c86
font_02_sfnt_off000141bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141BB 16248 bytes
SHA-256: c89cd4610e7ad6cabf04f9876a36b22b5c31ae53dba02aeaa1b4677657537330

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