Malicious PDF — malware analysis report

Static analysis result for SHA-256 1decbe602ba9ddc9…

MALICIOUS

PDF

84.5 KB Created: 2021-04-19 16:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b8a16b5ffca78c2bc15faccad97f8ec6 SHA-1: 2409d522f1af9e7e112247f4a50d16e52dee6c26 SHA-256: 1decbe602ba9ddc93c6a113c7f6d3c1e66f21ed0332865f9cd3bd2b3cc2cc16f
186 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The presence of embedded URLs and the overall structure suggest an attempt to lure victims to potentially malicious websites, possibly for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://mezovuduw.ru/strik?utm_term=diario+de+greg+2017+pelicula+completa PDF link annotation
    • https://sevexuwajewedov.weebly.com/uploads/1/3/4/5/134508994/1843322.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/is_cyberpunk_2077_multiplayer_coming_out.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449779/normal_5ff236c429f0f.pdfIn PDF document text
    • https://tujarabevazedi.weebly.com/uploads/1/3/4/2/134235746/5817870.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/6108c03da025968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379054/normal_5fd9d92ec6c43.pdfIn PDF document text
    • https://ranefegol.weebly.com/uploads/1/3/4/4/134498511/7171087.pdfIn PDF document text
    • https://mibivatoroxup.weebly.com/uploads/1/3/4/7/134762409/nemotavaxaze.pdfIn PDF document text
    • https://poxefapujo.weebly.com/uploads/1/3/5/3/135312596/8422848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482207/normal_6017420f587b9.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/wabeboxerazisiginuk.pdfIn PDF document text
    • https://vedalamiru.weebly.com/uploads/1/3/0/7/130776143/rifarokarap_lasojulafu_femuxol_tusaji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d4e3adcc-af7d-43df-9e29-3c4aeb616769/22620361194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09aaa694-4a8f-4a83-874f-cacb6c03313b/soworusan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1988b5dd-068b-4240-85ae-807965a7b314/jipunud.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/life_fitness_95ci_upright_bike_reviews.pdfIn PDF document text
    • http://zejibanunepi.myartsonline.com/8114476660.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/arlington_va_file_police_report.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/coordinating_conjunction_exercises.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC5 5396 bytes
SHA-256: 9cfead3902cff71888371c57fc4c893d2ad4eca393c992c1c8b662da7f23c41e
font_01_sfnt_off00010d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D37 12360 bytes
SHA-256: ffc6adff38e94e3a06ee6a8a48c0e7a81a33897c009ced9522bce7df850065fc
font_02_sfnt_off000134d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134D2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2