Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7afe797df373b9a…

MALICIOUS

PDF

90.2 KB Created: 2021-02-16 01:25:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: f48e12a6d94ed79ae3f12711a69f3861 SHA-1: e3f9771be69a0bc9b6a97febfec045ed4b06918f SHA-256: d7afe797df373b9a5d92c639d0d418618ac4c8ff1a3f39c211f3c48c3c6453d7
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded URL, 'https://druttle.ru/wix?keyword=perimeter+and+area+of+composite+figures+word+problems+answers', suggests a phishing or social engineering lure, attempting to trick users into visiting a potentially harmful site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=perimeter+and+area+of+composite+figures+word+problems+answers PDF link annotation
    • https://tifozemeg.weebly.com/uploads/1/3/5/3/135325228/804639172aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451561/normal_5fd0d3747323a.pdfIn PDF document text
    • http://dikiwezuvejeve.iblogger.org/43517680344.pdfIn PDF document text
    • https://bigidogeto.weebly.com/uploads/1/3/0/8/130874652/durizufabipinefi.pdfIn PDF document text
    • https://pufokebisuniga.weebly.com/uploads/1/3/5/3/135324869/bdaaaf5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420745/normal_5fd9e559135a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410206/normal_5fe098a03b808.pdfIn PDF document text
    • https://litizabege.weebly.com/uploads/1/3/4/7/134713043/865e74d82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505687/normal_5fdedb36ccbb5.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/tulosa/kegexutaxajiribopo.pdfIn PDF document text
    • http://lukigek.rf.gd/85684397534.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/asuran_bgm_tamil_masstamilan.pdfIn PDF document text
    • http://rojapamun.epizy.com/network_monitor_mini_pro_apk_terbaru.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/autodwg_to_dwg_converter_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/leckie_leckie_advanced_higher_maths_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/bollywood_mkv_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/29679063895.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/inteligencia_emocional_daniel_goleman_resumen.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
    • 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_off00010e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E54 5708 bytes
SHA-256: a0e172feed9f10d519020f1e7997e2dbedec5723375f43e7bfe0ecdf51767aa9
font_01_sfnt_off000121b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B3 10596 bytes
SHA-256: cb2b602e69e1c8feac102ad206aa05e4f111f73fa76a9e8927ba01daabb856db
font_02_sfnt_off00014636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14636 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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