Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad14342c1184ac2d…

MALICIOUS

PDF

73.0 KB Created: 2021-02-17 18:32:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 451e9cef11a75cda7e1130f5c4d5151a SHA-1: b3d78cc2a4bb562f16b34ee19d672e63475b730e SHA-256: ad14342c1184ac2d49bfa01757a444c2644baba693c375d8aa7878d109a5d5d3
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to ending a lease agreement, suggesting a phishing or social engineering lure. The embedded URL 'https://yafferge.ru/123?utm_term=how+to+end+a+lease+agreement' is the primary indicator of malicious intent, likely leading to a further stage of attack.

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
  • 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://yafferge.ru/123?utm_term=how+to+end+a+lease+agreement In PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/dorut-nibiwilena-fuviwuwimumen.pdfIn PDF document text
    • http://vuxuxabuj.iblogger.org/75209414003.pdfIn PDF document text
    • https://dudunubute.weebly.com/uploads/1/3/4/1/134132035/wuwaperoxowobu-varoxep.pdfIn PDF document text
    • http://gomijojupi.iblogger.org/mopenofu.pdfIn PDF document text
    • https://risogaruwakev.weebly.com/uploads/1/3/4/6/134634919/napuj_kusaxo_fosabeniluxam_degov.pdfIn PDF document text
    • http://mexicotop.xyz/nabemabenidirofurova5vbzu.pdfIn PDF document text
    • https://kijujula.weebly.com/uploads/1/3/4/7/134756294/f34fa25f1db.pdfIn PDF document text
    • http://zalewef.iblogger.org/autobots_in_transformers_1.pdfIn PDF document text
    • https://pegujugadul.weebly.com/uploads/1/3/1/6/131637136/5d231.pdfIn PDF document text
    • http://salonlabs.xyz/hulu_wu_tang_saga_season_2q0djp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zuwosopawekaz.rf.gd/business_studies_a_level_notes.pdfIn PDF document text
    • http://wewojujimijanu.rf.gd/woduxife.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/zadot.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/photography_website_templates_html.pdfIn PDF document text
    • http://wetovokerug.epizy.com/yahoo_answers_pregnancy_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/glorious_morning_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/non_fiction_guided_reading_activities_year_2.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/74784155219.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d57d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD57D 4936 bytes
SHA-256: 37476f67ef23f44c99a9d37a95dba19296bb5b777606344e7ff5af271186896b
font_01_sfnt_off0000e639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE639 10180 bytes
SHA-256: 90983dc8bcda20a4b0804f3713b5a8a92dcaddf389d4ad8d102ae280709d004a
font_02_sfnt_off000108d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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