Malicious PDF — malware analysis report

Static analysis result for SHA-256 59889d4414d3ee92…

MALICIOUS

PDF

78.6 KB Created: 2021-03-02 13:36:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: d5c53e46424ac1a2404eb7987e1b7a66 SHA-1: 219f12fed708015202b910caf0b1fcefaa13add3 SHA-256: 59889d4414d3ee92e4603e59e6b0422bd6db78bce1ee20369b66d75637a9fcda
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'nuclear health physicist' careers, aiming to trick users into clicking the malicious links.

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 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://maypoin.ru/strik?utm_term=how+to+become+a+nuclear+health+physicist PDF link annotation
    • http://kefijor.mygamesonline.org/gospel_of_the_holy_twelve.pdfIn PDF document text
    • https://bivojivowuru.weebly.com/uploads/1/3/4/7/134726538/1439523.pdfIn PDF document text
    • http://fetokoporumof.22web.org/acrobat_reader_for_windows_xp_free.pdfIn PDF document text
    • https://vonuvevija.weebly.com/uploads/1/3/1/4/131407152/3940126.pdfIn PDF document text
    • https://madaremowigefin.weebly.com/uploads/1/3/2/6/132681361/pulilotug_kijapadoru.pdfIn PDF document text
    • http://kuxixel.iblogger.org/dopixipiwumiluwiro.pdfIn PDF document text
    • http://kefojixesopu.66ghz.com/baseball_uniforms_san_antonio_tx.pdfIn PDF document text
    • http://zuxegesa.iblogger.org/the_top_five_regrets_of_the_dying_espaol.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/xolorelenonotasatoseposa.pdfIn PDF document text
    • http://lezepubaj.iblogger.org/zero_conditionals_worksheets.pdfIn PDF document text
    • https://fawimerena.weebly.com/uploads/1/3/4/6/134630635/6f6d326a9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sojisij.epizy.com/26025455454.pdfIn PDF document text
    • http://gupizamowakop.myartsonline.com/daily_reading_comprehension_grade_1_download.pdfIn PDF document text
    • http://dibulazovila.rf.gd/data_analysis_reports_examples.pdfIn PDF document text
    • http://nagivozuzosawax.rf.gd/16808467697.pdfIn PDF document text
    • http://tuwutexo.onlinewebshop.net/blacks_law_dictionary_human_being.pdfIn PDF document text
    • http://tezuzatarezoz.epizy.com/73866000366.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_off0000f5a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 5468 bytes
SHA-256: 0c3664dac5e71b754d6f8fa24c9e5ec80afb62923cbad09e2cc74538c9cdbc54
font_01_sfnt_off00010819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10819 10864 bytes
SHA-256: c550251c092524e1c338734f7aba8667a56fcdd2ee713157fc7443963e1c15d7

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