Malicious PDF — malware analysis report

Static analysis result for SHA-256 0175ef4af70988aa…

MALICIOUS

PDF

77.6 KB Created: 2021-04-21 06:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 126b736d75196d02d8ecf6ddc34332e2 SHA-1: 2340624c3daf8cbe9df5bdd313fbee0ef2fd0a62 SHA-256: 0175ef4af70988aab026864d8a3d8be9148d8f59922ed9283c929a57380417a1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and a heuristic identified it as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://zajinet.ru/strik?utm_term=ue+megaboom+3+for+sale PDF link annotation
    • http://sibatotud.iblogger.org/microsoft_azure_service_bus_explorer.pdfIn PDF document text
    • http://wide-mean.top/4459567296tf16t.pdfIn PDF document text
    • http://copyrightviolationcenters.com/constelaes_familiaresagzxt.pdfIn PDF document text
    • http://xoxosedefoxadu.mygamesonline.org/hindu_calendar_2020_panchang.pdfIn PDF document text
    • http://fejekadiwoxobiz.getenjoyment.net/volakefutelazidaxoneto.pdfIn PDF document text
    • https://xanuzejo.weebly.com/uploads/1/3/1/6/131637194/8125601.pdfIn PDF document text
    • https://nudiwosesi.weebly.com/uploads/1/3/4/3/134317077/6d213ff6e.pdfIn PDF document text
    • http://perudewoketusam.iblogger.org/how_to_integrate_sinx3.pdfIn PDF document text
    • https://pomulopegodetom.weebly.com/uploads/1/3/1/3/131384256/c3494f.pdfIn PDF document text
    • http://mini-cam1.club/75201152976p9b98.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/objective_history_of_english_literature_download.pdfIn PDF document text
    • http://vukuradi.mygamesonline.org/alice_in_wonderland_book_lewis_carroll.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/a_study_on_work_life_balance_of_employees.pdfIn PDF document text
    • https://kixarazebeda.weebly.com/uploads/1/3/0/7/130776474/pumovolumikevu.pdfIn PDF document text
    • http://wiwikiru.iblogger.org/mechanical_engineering_technician_careers_nz.pdfIn PDF document text
    • https://pokeboxut.weebly.com/uploads/1/3/1/4/131437348/369089.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zidibivitu.epizy.com/tugunuzubawulexu.pdfIn PDF document text
    • http://waweviw.rf.gd/41381771006.pdfIn PDF document text
    • http://votarim.epizy.com/15851924248.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/bio_101_general_biology.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/tujiw.pdfIn PDF document text
    • http://borinalujid.epizy.com/mewefobukudaberes.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/58729970737.pdfIn PDF document text
    • http://valodabopovox.rf.gd/candlestick_types.pdfIn PDF document text
    • http://fipivolakiwupod.rf.gd/59295781054.pdfIn PDF document text
    • http://valodabopovox.rf.gd/vijesepovedekuzidoki.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_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 5380 bytes
SHA-256: d63dac3942fc4afbf08e2fb46147a75fb2138113dd91773c7080e1cb57a10a32
font_01_sfnt_off000102e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E6 11376 bytes
SHA-256: 3290d05315ab8ddf0f188b951ef02de1604bc4eb0e7d656c4622b219f4e7a850

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