Malicious PDF — malware analysis report

Static analysis result for SHA-256 476bccd1f12bab09…

MALICIOUS

PDF

78.8 KB Created: 2021-05-07 14:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: e909ce910f2460c2df738f55b14411df SHA-1: 7a646c8ac0e5e1a0a8620dc010bc530b5de8c0c5 SHA-256: 476bccd1f12bab095ac70b2de272bb625917e315d9372001563752aceb63d79f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are consistent with techniques used to redirect users to malicious sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/strik?utm_term=the+ones+who+walk+away+from+omelas+metaphor PDF link annotation
    • https://nolizusumebixaz.weebly.com/uploads/1/3/1/4/131438071/118bbda.pdfIn PDF document text
    • http://gutagige.sportsontheweb.net/teorias_del_aprendizaje_significativo.pdfIn PDF document text
    • http://lnstgramhelpcopyright.com/handbook_of_livestock_managementfzwxx.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/70a98e.pdfIn PDF document text
    • http://eurozone.pro/how_to_get_procreate_pocket_for_free_20191qw9z.pdfIn PDF document text
    • http://dronextactical.xyz/birelederox7k44p.pdfIn PDF document text
    • https://vizepojazitebag.weebly.com/uploads/1/3/4/1/134108988/b2c6b.pdfIn PDF document text
    • http://boothattendant.com/mopekipukujojsq2rg.pdfIn PDF document text
    • http://juvivufokif.22web.org/lakali.pdfIn PDF document text
    • http://musomojil.mywebcommunity.org/9360572807.pdfIn PDF document text
    • https://ziwagunu.weebly.com/uploads/1/3/4/8/134883986/tomexutugeligukox.pdfIn PDF document text
    • http://medesutaduj.22web.org/fastest_android_web_browser_2019.pdfIn PDF document text
    • http://thailandlove.site/jack_daniels_running_formulaaih3x.pdfIn PDF document text
    • http://lorewipa.scienceontheweb.net/cpwd_specification_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://talakukatutevib.epizy.com/acier_bat_text_gris_font.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38a4eda-28f3-41b7-8588-ee10f27ead48/59837979254.pdfIn PDF document text
    • http://gegetebipa.atwebpages.com/notas_de_acordeon_de_teclas.pdfIn PDF document text
    • http://rubuvajaroxe.epizy.com/kepavoxotewiwasejigifaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c53aecfa-0de1-4769-92d2-3c7b2c7a8f63/masterbuilt_propane_smoker_user_manual.pdfIn PDF document text
    • http://veguxakafopuvix.epizy.com/sipuxudiwukojadus.pdfIn PDF document text
    • http://xerobesufeworep.rf.gd/35913428112.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbbba56e-b6cf-4c7d-b2f7-2c2a170e3365/11897244196.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de27aa7-c132-487a-b5b4-f138a517aeca/is_it_a_pimple_or_a_mole.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_off0000f4bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BC 5348 bytes
SHA-256: d863f71629094b5ffc55c7f1ff9c516bc0368609e3277386d9d00c6b98d59643
font_01_sfnt_off000106d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D9 10872 bytes
SHA-256: e6f6c7d202fc39627466887c05f68a16722f2cc516981eeaf2cb5225cccefae8

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