Malicious PDF — malware analysis report

Static analysis result for SHA-256 e473068ea4d348cf…

MALICIOUS

PDF

75.7 KB Created: 2021-03-06 11:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 46a49d19d947cd279fde1549fd5e6353 SHA-1: aec25755ae4fec408b58c9a2c4199e58533727d8 SHA-256: e473068ea4d348cf1d2ec516ad0ff596c8e29c80563d4c0d2d09fb02ee98652a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, with one specifically identified as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the nature of the PDF heuristics suggest it's designed to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=resumen+corto+del+libro+un+grito+desesperado PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4465257/normal_5fdd9859de152.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/wefenirirozujupujovepolur.pdfIn PDF document text
    • http://fozixozag.iblogger.org/online_project_management_course_university.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423430/normal_5fdd69a22462e.pdfIn PDF document text
    • http://padulima.22web.org/63416148981.pdfIn PDF document text
    • http://xakidofe.sportsontheweb.net/dwarf_blood_bowl_set_up.pdfIn PDF document text
    • http://sunuzajiwexo.22web.org/roku_black_friday_2020_canada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/742d3e24-8e87-4c64-9dc2-4f2a76b07fb6/90709777352.pdfIn PDF document text
    • http://nununad.myartsonline.com/garejexesikenumodexawa.pdfIn PDF document text
    • http://wasamatebupo.rf.gd/tft_9._18_item_cheat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/browser_file_instead_of_opening_it.pdfIn PDF document text
    • http://dogiperij.epizy.com/96232524552.pdfIn PDF document text
    • http://molomafifivis.epizy.com/matelofa.pdfIn PDF document text
    • http://jonokib.rf.gd/how_to_record_interim_dividend_paid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90772c38-4c69-46f3-b541-f631dbb24fa6/bimovonazimumiva.pdfIn PDF document text
    • http://mivimuzuge.rf.gd/what_was_the_outcome_of_the_agricultural_revolution.pdfIn PDF document text
    • http://gelutusuxipedib.rf.gd/python_setup.py_build_egg.pdfIn PDF document text
    • http://jinoratizoja.epizy.com/tiny_archers_unlimited_gems_and_money_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/57040447395.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/monthly_fire_extinguisher_inspection_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/free_online_bumper_sticker_template.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_off0000e891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE891 5540 bytes
SHA-256: 5c15c7785b2037fea85e9a832a26d45e1f82c54e039727cbcdf156dcc6ae77ea
font_01_sfnt_off0000fb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB49 11524 bytes
SHA-256: c0098e0f54ddf54cfed44f156012d81de9a0955aebfee530e3fd27aba2fe9583

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