Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e9af9459e0d13f…

MALICIOUS

PDF

74.3 KB Created: 2021-05-13 21:01:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 416984be1ec2b89adee74660b45f76ec SHA-1: 25c4f89ee24f777fd74683c9cc57dad6b377b700 SHA-256: 55e9af9459e0d13f81db40bea3ea9e2c27111c36addf4761a4b29025b1ec7b53
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of embedded external links, suggesting a link farm or phishing attempt. The presence of these links and the overall structure indicate a malicious intent to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=walter+benjamin+concepto+de+aura PDF link annotation
    • https://furadigiwib.weebly.com/uploads/1/3/1/4/131407367/e5e140444fb8.pdfIn PDF document text
    • http://fullcreditreport.info/146_or_147_of_the_law_of_property_act_192553t82.pdfIn PDF document text
    • https://bonorira.weebly.com/uploads/1/3/5/3/135346760/vutukuzuxu-lixixagituve-lobofudolapikaz-bafomus.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/6idggfQ/75853869823.pdfIn PDF document text
    • http://thrivewebs.com/tibofngpw8.pdfIn PDF document text
    • https://vokafevevuw.weebly.com/uploads/1/3/4/3/134320681/rekirozaxenozedanoj.pdfIn PDF document text
    • https://mijevofere.weebly.com/uploads/1/3/1/6/131606011/54050538f238e.pdfIn PDF document text
    • https://figiroxofidun.weebly.com/uploads/1/3/0/7/130740151/xuxomin.pdfIn PDF document text
    • https://cdn.sqhk.co/puvubuzu/gYjjia4/9984462500.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/mokamoba/chakravarthy_movie_ringtones_free.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_9b03b46c713041b39890bd2214778055.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_4b56bda9382e46a4ab0d175fcb361273.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/how_to_turn_off_dish_receiver.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/td_jakes_anointing_fall_on_me.pdfIn PDF document text
    • http://dolafesa.epizy.com/sat_writing_practice_khan_academy.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/kajepo.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/simple_feasibility_study_template_excel.pdfIn PDF document text
    • http://vepufuxizuzule.epizy.com/delegation_of_authority_form.pdfIn PDF document text
    • http://wazinupizut.epizy.com/85139520844.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_off0000e413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE413 5268 bytes
SHA-256: ee53cfc0491f0c33caa70ab60530f64a154f81589957d31226722215d6cd656e
font_01_sfnt_off0000f5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5F5 11192 bytes
SHA-256: 425e6e2e616347bfc5cbe1a5258420e6535bc2239cc1fb368b47b4575d706a9a

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